removal deprecated in 7.10 (#14614)

IPython/core/oinspect.py

@@ -1,1246 +1,1210
 """Tools for inspecting Python objects.
 
 Uses syntax highlighting for presenting the various information elements.
 
 Similar in spirit to the inspect module, but all calls take a name argument to
 reference the name under which an object is being read.
 """
 
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 
 __all__ = ['Inspector','InspectColors']
 
 # stdlib modules
 from dataclasses import dataclass
 from inspect import signature
 from textwrap import dedent
 import ast
 import html
 import inspect
 import io as stdlib_io
 import linecache
 import os
 import types
 import warnings
 
 
 from typing import (
     cast,
     Any,
     Optional,
     Dict,
     Union,
     List,
     TypedDict,
     TypeAlias,
     Tuple,
 )
 
 import traitlets
 
 # IPython's own
 from IPython.core import page
 from IPython.lib.pretty import pretty
 from IPython.testing.skipdoctest import skip_doctest
 from IPython.utils import PyColorize, openpy
 from IPython.utils.dir2 import safe_hasattr
 from IPython.utils.path import compress_user
 from IPython.utils.text import indent
 from IPython.utils.wildcard import list_namespace, typestr2type
 from IPython.utils.coloransi import TermColors
 from IPython.utils.colorable import Colorable
 from IPython.utils.decorators import undoc
 
 from pygments import highlight
 from pygments.lexers import PythonLexer
 from pygments.formatters import HtmlFormatter
 
 HOOK_NAME = "__custom_documentations__"
 
 
 UnformattedBundle: TypeAlias = Dict[str, List[Tuple[str, str]]]  # List of (title, body)
 Bundle: TypeAlias = Dict[str, str]
 
 
 @dataclass
 class OInfo:
     ismagic: bool
     isalias: bool
     found: bool
     namespace: Optional[str]
     parent: Any
     obj: Any
 
     def get(self, field):
         """Get a field from the object for backward compatibility with before 8.12
 
         see https://github.com/h5py/h5py/issues/2253
         """
         # We need to deprecate this at some point, but the warning will show in completion.
         # Let's comment this for now and uncomment end of 2023 ish
         #        warnings.warn(
         #            f"OInfo dataclass with fields access since IPython 8.12 please use OInfo.{field} instead."
         #            "OInfo used to be a dict but a dataclass provide static fields verification with mypy."
         #            "This warning and backward compatibility `get()` method were added in 8.13.",
         #            DeprecationWarning,
         #            stacklevel=2,
         #        )
         return getattr(self, field)
 
 
 def pylight(code):
     return highlight(code, PythonLexer(), HtmlFormatter(noclasses=True))
 
 # builtin docstrings to ignore
 _func_call_docstring = types.FunctionType.__call__.__doc__
 _object_init_docstring = object.__init__.__doc__
 _builtin_type_docstrings = {
     inspect.getdoc(t) for t in (types.ModuleType, types.MethodType,
                                 types.FunctionType, property)
 }
 
 _builtin_func_type = type(all)
 _builtin_meth_type = type(str.upper)  # Bound methods have the same type as builtin functions
 #****************************************************************************
 # Builtin color schemes
 
 Colors = TermColors  # just a shorthand
 
 InspectColors = PyColorize.ANSICodeColors
 
 #****************************************************************************
 # Auxiliary functions and objects
 
 
 class InfoDict(TypedDict):
     type_name: Optional[str]
     base_class: Optional[str]
     string_form: Optional[str]
     namespace: Optional[str]
     length: Optional[str]
     file: Optional[str]
     definition: Optional[str]
     docstring: Optional[str]
     source: Optional[str]
     init_definition: Optional[str]
     class_docstring: Optional[str]
     init_docstring: Optional[str]
     call_def: Optional[str]
     call_docstring: Optional[str]
     subclasses: Optional[str]
     # These won't be printed but will be used to determine how to
     # format the object
     ismagic: bool
     isalias: bool
     isclass: bool
     found: bool
     name: str
 
 
 _info_fields = list(InfoDict.__annotations__.keys())
 
 
 def __getattr__(name):
     if name == "info_fields":
         warnings.warn(
             "IPython.core.oinspect's `info_fields` is considered for deprecation and may be removed in the Future. ",
             DeprecationWarning,
             stacklevel=2,
         )
         return _info_fields
 
     raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
 
 
 @dataclass
 class InspectorHookData:
     """Data passed to the mime hook"""
 
     obj: Any
     info: Optional[OInfo]
     info_dict: InfoDict
     detail_level: int
     omit_sections: list[str]
 
 
 @undoc
 def object_info(
     *,
     name: str,
     found: bool,
     isclass: bool = False,
     isalias: bool = False,
     ismagic: bool = False,
     **kw,
 ) -> InfoDict:
     """Make an object info dict with all fields present."""
     infodict = kw
     infodict = {k: None for k in _info_fields if k not in infodict}
     infodict["name"] = name  # type: ignore
     infodict["found"] = found  # type: ignore
     infodict["isclass"] = isclass  # type: ignore
     infodict["isalias"] = isalias  # type: ignore
     infodict["ismagic"] = ismagic  # type: ignore
 
     return InfoDict(**infodict)  # type:ignore
 
 
 def get_encoding(obj):
     """Get encoding for python source file defining obj
 
     Returns None if obj is not defined in a sourcefile.
     """
     ofile = find_file(obj)
     # run contents of file through pager starting at line where the object
     # is defined, as long as the file isn't binary and is actually on the
     # filesystem.
     if ofile is None:
         return None
     elif ofile.endswith(('.so', '.dll', '.pyd')):
         return None
     elif not os.path.isfile(ofile):
         return None
     else:
         # Print only text files, not extension binaries.  Note that
         # getsourcelines returns lineno with 1-offset and page() uses
         # 0-offset, so we must adjust.
         with stdlib_io.open(ofile, 'rb') as buffer:   # Tweaked to use io.open for Python 2
             encoding, _lines = openpy.detect_encoding(buffer.readline)
         return encoding
 
 
 def getdoc(obj) -> Union[str, None]:
     """Stable wrapper around inspect.getdoc.
 
     This can't crash because of attribute problems.
 
     It also attempts to call a getdoc() method on the given object.  This
     allows objects which provide their docstrings via non-standard mechanisms
     (like Pyro proxies) to still be inspected by ipython's ? system.
     """
     # Allow objects to offer customized documentation via a getdoc method:
     try:
         ds = obj.getdoc()
     except Exception:
         pass
     else:
         if isinstance(ds, str):
             return inspect.cleandoc(ds)
     docstr = inspect.getdoc(obj)
     return docstr
 
 
 def getsource(obj, oname='') -> Union[str,None]:
     """Wrapper around inspect.getsource.
 
     This can be modified by other projects to provide customized source
     extraction.
 
     Parameters
     ----------
     obj : object
         an object whose source code we will attempt to extract
     oname : str
         (optional) a name under which the object is known
 
     Returns
     -------
     src : unicode or None
 
     """
 
     if isinstance(obj, property):
         sources = []
         for attrname in ['fget', 'fset', 'fdel']:
             fn = getattr(obj, attrname)
             if fn is not None:
                 encoding = get_encoding(fn)
                 oname_prefix = ('%s.' % oname) if oname else ''
                 sources.append(''.join(('# ', oname_prefix, attrname)))
                 if inspect.isfunction(fn):
                     _src = getsource(fn)
                     if _src:
                         # assert _src is not None, "please mypy"
                         sources.append(dedent(_src))
                 else:
                     # Default str/repr only prints function name,
                     # pretty.pretty prints module name too.
                     sources.append(
                         '%s%s = %s\n' % (oname_prefix, attrname, pretty(fn))
                     )
         if sources:
             return '\n'.join(sources)
         else:
             return None
 
     else:
         # Get source for non-property objects.
 
         obj = _get_wrapped(obj)
 
         try:
             src = inspect.getsource(obj)
         except TypeError:
             # The object itself provided no meaningful source, try looking for
             # its class definition instead.
             try:
                 src = inspect.getsource(obj.__class__)
             except (OSError, TypeError):
                 return None
         except OSError:
             return None
 
         return src
 
 
 def is_simple_callable(obj):
     """True if obj is a function ()"""
     return (inspect.isfunction(obj) or inspect.ismethod(obj) or \
             isinstance(obj, _builtin_func_type) or isinstance(obj, _builtin_meth_type))
 
-@undoc
-def getargspec(obj):
-    """Wrapper around :func:`inspect.getfullargspec`
-
-    In addition to functions and methods, this can also handle objects with a
-    ``__call__`` attribute.
-
-    DEPRECATED: Deprecated since 7.10. Do not use, will be removed.
-    """
-
-    warnings.warn('`getargspec` function is deprecated as of IPython 7.10'
-                  'and will be removed in future versions.', DeprecationWarning, stacklevel=2)
-
-    if safe_hasattr(obj, '__call__') and not is_simple_callable(obj):
-        obj = obj.__call__
-
-    return inspect.getfullargspec(obj)
-
-@undoc
-def format_argspec(argspec):
-    """Format argspect, convenience wrapper around inspect's.
-
-    This takes a dict instead of ordered arguments and calls
-    inspect.format_argspec with the arguments in the necessary order.
-
-    DEPRECATED (since 7.10): Do not use; will be removed in future versions.
-    """
-    
-    warnings.warn('`format_argspec` function is deprecated as of IPython 7.10'
-                  'and will be removed in future versions.', DeprecationWarning, stacklevel=2)
-
-
-    return inspect.formatargspec(argspec['args'], argspec['varargs'],
-                                 argspec['varkw'], argspec['defaults'])
-
-
 def _get_wrapped(obj):
     """Get the original object if wrapped in one or more @decorators
 
     Some objects automatically construct similar objects on any unrecognised
     attribute access (e.g. unittest.mock.call). To protect against infinite loops,
     this will arbitrarily cut off after 100 levels of obj.__wrapped__
     attribute access. --TK, Jan 2016
     """
     orig_obj = obj
     i = 0
     while safe_hasattr(obj, '__wrapped__'):
         obj = obj.__wrapped__
         i += 1
         if i > 100:
             # __wrapped__ is probably a lie, so return the thing we started with
             return orig_obj
     return obj
 
 def find_file(obj) -> Optional[str]:
     """Find the absolute path to the file where an object was defined.
 
     This is essentially a robust wrapper around `inspect.getabsfile`.
 
     Returns None if no file can be found.
 
     Parameters
     ----------
     obj : any Python object
 
     Returns
     -------
     fname : str
         The absolute path to the file where the object was defined.
     """
     obj = _get_wrapped(obj)
 
     fname: Optional[str] = None
     try:
         fname = inspect.getabsfile(obj)
     except TypeError:
         # For an instance, the file that matters is where its class was
         # declared.
         try:
             fname = inspect.getabsfile(obj.__class__)
         except (OSError, TypeError):
             # Can happen for builtins
             pass
     except OSError:
         pass
 
     return fname
 
 
 def find_source_lines(obj):
     """Find the line number in a file where an object was defined.
 
     This is essentially a robust wrapper around `inspect.getsourcelines`.
 
     Returns None if no file can be found.
 
     Parameters
     ----------
     obj : any Python object
 
     Returns
     -------
     lineno : int
         The line number where the object definition starts.
     """
     obj = _get_wrapped(obj)
 
     try:
         lineno = inspect.getsourcelines(obj)[1]
     except TypeError:
         # For instances, try the class object like getsource() does
         try:
             lineno = inspect.getsourcelines(obj.__class__)[1]
         except (OSError, TypeError):
             return None
     except OSError:
         return None
 
     return lineno
 
 class Inspector(Colorable):
 
     mime_hooks = traitlets.Dict(
         config=True,
         help="dictionary of mime to callable to add information into help mimebundle dict",
     ).tag(config=True)
 
     def __init__(
         self,
         color_table=InspectColors,
         code_color_table=PyColorize.ANSICodeColors,
         scheme=None,
         str_detail_level=0,
         parent=None,
         config=None,
     ):
         super(Inspector, self).__init__(parent=parent, config=config)
         self.color_table = color_table
         self.parser = PyColorize.Parser(out='str', parent=self, style=scheme)
         self.format = self.parser.format
         self.str_detail_level = str_detail_level
         self.set_active_scheme(scheme)
 
     def _getdef(self,obj,oname='') -> Union[str,None]:
         """Return the call signature for any callable object.
 
         If any exception is generated, None is returned instead and the
         exception is suppressed."""
         if not callable(obj):
             return None
         try:
             return _render_signature(signature(obj), oname)
         except:
             return None
 
     def __head(self,h) -> str:
         """Return a header string with proper colors."""
         return '%s%s%s' % (self.color_table.active_colors.header,h,
                            self.color_table.active_colors.normal)
 
     def set_active_scheme(self, scheme):
         if scheme is not None:
             self.color_table.set_active_scheme(scheme)
             self.parser.color_table.set_active_scheme(scheme)
 
     def noinfo(self, msg, oname):
         """Generic message when no information is found."""
         print('No %s found' % msg, end=' ')
         if oname:
             print('for %s' % oname)
         else:
             print()
 
     def pdef(self, obj, oname=''):
         """Print the call signature for any callable object.
 
         If the object is a class, print the constructor information."""
 
         if not callable(obj):
             print('Object is not callable.')
             return
 
         header = ''
 
         if inspect.isclass(obj):
             header = self.__head('Class constructor information:\n')
 
 
         output = self._getdef(obj,oname)
         if output is None:
             self.noinfo('definition header',oname)
         else:
             print(header,self.format(output), end=' ')
 
     # In Python 3, all classes are new-style, so they all have __init__.
     @skip_doctest
     def pdoc(self, obj, oname='', formatter=None):
         """Print the docstring for any object.
 
         Optional:
         -formatter: a function to run the docstring through for specially
         formatted docstrings.
 
         Examples
         --------
         In [1]: class NoInit:
            ...:     pass
 
         In [2]: class NoDoc:
            ...:     def __init__(self):
            ...:         pass
 
         In [3]: %pdoc NoDoc
         No documentation found for NoDoc
 
         In [4]: %pdoc NoInit
         No documentation found for NoInit
 
         In [5]: obj = NoInit()
 
         In [6]: %pdoc obj
         No documentation found for obj
 
         In [5]: obj2 = NoDoc()
 
         In [6]: %pdoc obj2
         No documentation found for obj2
         """
 
         head = self.__head  # For convenience
         lines = []
         ds = getdoc(obj)
         if formatter:
             ds = formatter(ds).get('plain/text', ds)
         if ds:
             lines.append(head("Class docstring:"))
             lines.append(indent(ds))
         if inspect.isclass(obj) and hasattr(obj, '__init__'):
             init_ds = getdoc(obj.__init__)
             if init_ds is not None:
                 lines.append(head("Init docstring:"))
                 lines.append(indent(init_ds))
         elif hasattr(obj,'__call__'):
             call_ds = getdoc(obj.__call__)
             if call_ds:
                 lines.append(head("Call docstring:"))
                 lines.append(indent(call_ds))
 
         if not lines:
             self.noinfo('documentation',oname)
         else:
             page.page('\n'.join(lines))
 
     def psource(self, obj, oname=''):
         """Print the source code for an object."""
 
         # Flush the source cache because inspect can return out-of-date source
         linecache.checkcache()
         try:
             src = getsource(obj, oname=oname)
         except Exception:
             src = None
 
         if src is None:
             self.noinfo('source', oname)
         else:
             page.page(self.format(src))
 
     def pfile(self, obj, oname=''):
         """Show the whole file where an object was defined."""
 
         lineno = find_source_lines(obj)
         if lineno is None:
             self.noinfo('file', oname)
             return
 
         ofile = find_file(obj)
         # run contents of file through pager starting at line where the object
         # is defined, as long as the file isn't binary and is actually on the
         # filesystem.
         if ofile is None:
             print("Could not find file for object")
         elif ofile.endswith((".so", ".dll", ".pyd")):
             print("File %r is binary, not printing." % ofile)
         elif not os.path.isfile(ofile):
             print('File %r does not exist, not printing.' % ofile)
         else:
             # Print only text files, not extension binaries.  Note that
             # getsourcelines returns lineno with 1-offset and page() uses
             # 0-offset, so we must adjust.
             page.page(self.format(openpy.read_py_file(ofile, skip_encoding_cookie=False)), lineno - 1)
 
 
     def _mime_format(self, text:str, formatter=None) -> dict:
         """Return a mime bundle representation of the input text.
 
         - if `formatter` is None, the returned mime bundle has
            a ``text/plain`` field, with the input text.
            a ``text/html`` field with a ``<pre>`` tag containing the input text.
 
         - if ``formatter`` is not None, it must be a callable transforming the
           input text into a mime bundle. Default values for ``text/plain`` and
           ``text/html`` representations are the ones described above.
 
         Note:
 
         Formatters returning strings are supported but this behavior is deprecated.
 
         """
         defaults = {
             "text/plain": text,
             "text/html": f"<pre>{html.escape(text)}</pre>",
         }
 
         if formatter is None:
             return defaults
         else:
             formatted = formatter(text)
 
             if not isinstance(formatted, dict):
                 # Handle the deprecated behavior of a formatter returning
                 # a string instead of a mime bundle.
                 return {"text/plain": formatted, "text/html": f"<pre>{formatted}</pre>"}
 
             else:
                 return dict(defaults, **formatted)
 
     def format_mime(self, bundle: UnformattedBundle) -> Bundle:
         """Format a mimebundle being created by _make_info_unformatted into a real mimebundle"""
         # Format text/plain mimetype
         assert isinstance(bundle["text/plain"], list)
         for item in bundle["text/plain"]:
             assert isinstance(item, tuple)
 
         new_b: Bundle = {}
         lines = []
         _len = max(len(h) for h, _ in bundle["text/plain"])
 
         for head, body in bundle["text/plain"]:
             body = body.strip("\n")
             delim = "\n" if "\n" in body else " "
             lines.append(
                 f"{self.__head(head+':')}{(_len - len(head))*' '}{delim}{body}"
             )
 
         new_b["text/plain"] = "\n".join(lines)
 
         if "text/html" in bundle:
             assert isinstance(bundle["text/html"], list)
             for item in bundle["text/html"]:
                 assert isinstance(item, tuple)
             # Format the text/html mimetype
             if isinstance(bundle["text/html"], (list, tuple)):
                 # bundle['text/html'] is a list of (head, formatted body) pairs
                 new_b["text/html"] = "\n".join(
                     (f"<h1>{head}</h1>\n{body}" for (head, body) in bundle["text/html"])
                 )
 
         for k in bundle.keys():
             if k in ("text/html", "text/plain"):
                 continue
             else:
                 new_b[k] = bundle[k]  # type:ignore
         return new_b
 
     def _append_info_field(
         self,
         bundle: UnformattedBundle,
         title: str,
         key: str,
         info,
         omit_sections: List[str],
         formatter,
     ):
         """Append an info value to the unformatted mimebundle being constructed by _make_info_unformatted"""
         if title in omit_sections or key in omit_sections:
             return
         field = info[key]
         if field is not None:
             formatted_field = self._mime_format(field, formatter)
             bundle["text/plain"].append((title, formatted_field["text/plain"]))
             bundle["text/html"].append((title, formatted_field["text/html"]))
 
     def _make_info_unformatted(
         self, obj, info, formatter, detail_level, omit_sections
     ) -> UnformattedBundle:
         """Assemble the mimebundle as unformatted lists of information"""
         bundle: UnformattedBundle = {
             "text/plain": [],
             "text/html": [],
         }
 
         # A convenience function to simplify calls below
         def append_field(
             bundle: UnformattedBundle, title: str, key: str, formatter=None
         ):
             self._append_info_field(
                 bundle,
                 title=title,
                 key=key,
                 info=info,
                 omit_sections=omit_sections,
                 formatter=formatter,
             )
 
         def code_formatter(text) -> Bundle:
             return {
                 'text/plain': self.format(text),
                 'text/html': pylight(text)
             }
 
         if info["isalias"]:
             append_field(bundle, "Repr", "string_form")
 
         elif info['ismagic']:
             if detail_level > 0:
                 append_field(bundle, "Source", "source", code_formatter)
             else:
                 append_field(bundle, "Docstring", "docstring", formatter)
             append_field(bundle, "File", "file")
 
         elif info['isclass'] or is_simple_callable(obj):
             # Functions, methods, classes
             append_field(bundle, "Signature", "definition", code_formatter)
             append_field(bundle, "Init signature", "init_definition", code_formatter)
             append_field(bundle, "Docstring", "docstring", formatter)
             if detail_level > 0 and info["source"]:
                 append_field(bundle, "Source", "source", code_formatter)
             else:
                 append_field(bundle, "Init docstring", "init_docstring", formatter)
 
             append_field(bundle, "File", "file")
             append_field(bundle, "Type", "type_name")
             append_field(bundle, "Subclasses", "subclasses")
 
         else:
             # General Python objects
             append_field(bundle, "Signature", "definition", code_formatter)
             append_field(bundle, "Call signature", "call_def", code_formatter)
             append_field(bundle, "Type", "type_name")
             append_field(bundle, "String form", "string_form")
 
             # Namespace
             if info["namespace"] != "Interactive":
                 append_field(bundle, "Namespace", "namespace")
 
             append_field(bundle, "Length", "length")
             append_field(bundle, "File", "file")
 
             # Source or docstring, depending on detail level and whether
             # source found.
             if detail_level > 0 and info["source"]:
                 append_field(bundle, "Source", "source", code_formatter)
             else:
                 append_field(bundle, "Docstring", "docstring", formatter)
 
             append_field(bundle, "Class docstring", "class_docstring", formatter)
             append_field(bundle, "Init docstring", "init_docstring", formatter)
             append_field(bundle, "Call docstring", "call_docstring", formatter)
         return bundle
 
 
     def _get_info(
         self,
         obj: Any,
         oname: str = "",
         formatter=None,
         info: Optional[OInfo] = None,
         detail_level: int = 0,
         omit_sections: Union[List[str], Tuple[()]] = (),
     ) -> Bundle:
         """Retrieve an info dict and format it.
 
         Parameters
         ----------
         obj : any
             Object to inspect and return info from
         oname : str (default: ''):
             Name of the variable pointing to `obj`.
         formatter : callable
         info
             already computed information
         detail_level : integer
             Granularity of detail level, if set to 1, give more information.
         omit_sections : list[str]
             Titles or keys to omit from output (can be set, tuple, etc., anything supporting `in`)
         """
 
         info_dict = self.info(obj, oname=oname, info=info, detail_level=detail_level)
         omit_sections = list(omit_sections)
 
         bundle = self._make_info_unformatted(
             obj,
             info_dict,
             formatter,
             detail_level=detail_level,
             omit_sections=omit_sections,
         )
         if self.mime_hooks:
             hook_data = InspectorHookData(
                 obj=obj,
                 info=info,
                 info_dict=info_dict,
                 detail_level=detail_level,
                 omit_sections=omit_sections,
             )
             for key, hook in self.mime_hooks.items():  # type:ignore
                 required_parameters = [
                     parameter
                     for parameter in inspect.signature(hook).parameters.values()
                     if parameter.default != inspect.Parameter.default
                 ]
                 if len(required_parameters) == 1:
                     res = hook(hook_data)
                 else:
                     warnings.warn(
                         "MIME hook format changed in IPython 8.22; hooks should now accept"
                         " a single parameter (InspectorHookData); support for hooks requiring"
                         " two-parameters (obj and info) will be removed in a future version",
                         DeprecationWarning,
                         stacklevel=2,
                     )
                     res = hook(obj, info)
                 if res is not None:
                     bundle[key] = res
         return self.format_mime(bundle)
 
     def pinfo(
         self,
         obj,
         oname="",
         formatter=None,
         info: Optional[OInfo] = None,
         detail_level=0,
         enable_html_pager=True,
         omit_sections=(),
     ):
         """Show detailed information about an object.
 
         Optional arguments:
 
         - oname: name of the variable pointing to the object.
 
         - formatter: callable (optional)
               A special formatter for docstrings.
 
               The formatter is a callable that takes a string as an input
               and returns either a formatted string or a mime type bundle
               in the form of a dictionary.
 
               Although the support of custom formatter returning a string
               instead of a mime type bundle is deprecated.
 
         - info: a structure with some information fields which may have been
           precomputed already.
 
         - detail_level: if set to 1, more information is given.
 
         - omit_sections: set of section keys and titles to omit
         """
         assert info is not None
         info_b: Bundle = self._get_info(
             obj, oname, formatter, info, detail_level, omit_sections=omit_sections
         )
         if not enable_html_pager:
             del info_b["text/html"]
         page.page(info_b)
 
     def _info(self, obj, oname="", info=None, detail_level=0):
         """
         Inspector.info() was likely improperly marked as deprecated
         while only a parameter was deprecated. We "un-deprecate" it.
         """
 
         warnings.warn(
             "The `Inspector.info()` method has been un-deprecated as of 8.0 "
             "and the `formatter=` keyword removed. `Inspector._info` is now "
             "an alias, and you can just call `.info()` directly.",
             DeprecationWarning,
             stacklevel=2,
         )
         return self.info(obj, oname=oname, info=info, detail_level=detail_level)
 
     def info(self, obj, oname="", info=None, detail_level=0) -> InfoDict:
         """Compute a dict with detailed information about an object.
 
         Parameters
         ----------
         obj : any
             An object to find information about
         oname : str (default: '')
             Name of the variable pointing to `obj`.
         info : (default: None)
             A struct (dict like with attr access) with some information fields
             which may have been precomputed already.
         detail_level : int (default:0)
             If set to 1, more information is given.
 
         Returns
         -------
         An object info dict with known fields from `info_fields` (see `InfoDict`).
         """
 
         if info is None:
             ismagic = False
             isalias = False
             ospace = ''
         else:
             ismagic = info.ismagic
             isalias = info.isalias
             ospace = info.namespace
 
         # Get docstring, special-casing aliases:
         att_name = oname.split(".")[-1]
         parents_docs = None
         prelude = ""
         if info and info.parent is not None and hasattr(info.parent, HOOK_NAME):
             parents_docs_dict = getattr(info.parent, HOOK_NAME)
             parents_docs = parents_docs_dict.get(att_name, None)
         out: InfoDict = cast(
             InfoDict,
             {
                 **{field: None for field in _info_fields},
                 **{
                     "name": oname,
                     "found": True,
                     "isalias": isalias,
                     "ismagic": ismagic,
                     "subclasses": None,
                 },
             },
         )
 
         if parents_docs:
             ds = parents_docs
         elif isalias:
             if not callable(obj):
                 try:
                     ds = "Alias to the system command:\n  %s" % obj[1]
                 except:
                     ds = "Alias: " + str(obj)
             else:
                 ds = "Alias to " + str(obj)
                 if obj.__doc__:
                     ds += "\nDocstring:\n" + obj.__doc__
         else:
             ds_or_None = getdoc(obj)
             if ds_or_None is None:
                 ds = '<no docstring>'
             else:
                 ds = ds_or_None
 
         ds = prelude + ds
 
         # store output in a dict, we initialize it here and fill it as we go
 
         string_max = 200 # max size of strings to show (snipped if longer)
         shalf = int((string_max - 5) / 2)
 
         if ismagic:
             out['type_name'] = 'Magic function'
         elif isalias:
             out['type_name'] = 'System alias'
         else:
             out['type_name'] = type(obj).__name__
 
         try:
             bclass = obj.__class__
             out['base_class'] = str(bclass)
         except:
             pass
 
         # String form, but snip if too long in ? form (full in ??)
         if detail_level >= self.str_detail_level:
             try:
                 ostr = str(obj)
                 if not detail_level and len(ostr) > string_max:
                     ostr = ostr[:shalf] + ' <...> ' + ostr[-shalf:]
                     # TODO: `'string_form'.expandtabs()` seems wrong, but
                     # it was (nearly) like this since the first commit ever.
                     ostr = ("\n" + " " * len("string_form".expandtabs())).join(
                         q.strip() for q in ostr.split("\n")
                     )
                 out["string_form"] = ostr
             except:
                 pass
 
         if ospace:
             out['namespace'] = ospace
 
         # Length (for strings and lists)
         try:
             out['length'] = str(len(obj))
         except Exception:
             pass
 
         # Filename where object was defined
         binary_file = False
         fname = find_file(obj)
         if fname is None:
             # if anything goes wrong, we don't want to show source, so it's as
             # if the file was binary
             binary_file = True
         else:
             if fname.endswith(('.so', '.dll', '.pyd')):
                 binary_file = True
             elif fname.endswith('<string>'):
                 fname = 'Dynamically generated function. No source code available.'
             out['file'] = compress_user(fname)
 
         # Original source code for a callable, class or property.
         if detail_level:
             # Flush the source cache because inspect can return out-of-date
             # source
             linecache.checkcache()
             try:
                 if isinstance(obj, property) or not binary_file:
                     src = getsource(obj, oname)
                     if src is not None:
                         src = src.rstrip()
                     out['source'] = src
 
             except Exception:
                 pass
 
         # Add docstring only if no source is to be shown (avoid repetitions).
         if ds and not self._source_contains_docstring(out.get('source'), ds):
             out['docstring'] = ds
 
         # Constructor docstring for classes
         if inspect.isclass(obj):
             out['isclass'] = True
 
             # get the init signature:
             try:
                 init_def = self._getdef(obj, oname)
             except AttributeError:
                 init_def = None
 
             # get the __init__ docstring
             try:
                 obj_init = obj.__init__
             except AttributeError:
                 init_ds = None
             else:
                 if init_def is None:
                     # Get signature from init if top-level sig failed.
                     # Can happen for built-in types (list, etc.).
                     try:
                         init_def = self._getdef(obj_init, oname)
                     except AttributeError:
                         pass
                 init_ds = getdoc(obj_init)
                 # Skip Python's auto-generated docstrings
                 if init_ds == _object_init_docstring:
                     init_ds = None
 
             if init_def:
                 out['init_definition'] = init_def
 
             if init_ds:
                 out['init_docstring'] = init_ds
 
             names = [sub.__name__ for sub in type.__subclasses__(obj)]
             if len(names) < 10:
                 all_names = ', '.join(names)
             else:
                 all_names = ', '.join(names[:10]+['...'])
             out['subclasses'] = all_names
         # and class docstring for instances:
         else:
             # reconstruct the function definition and print it:
             defln = self._getdef(obj, oname)
             if defln:
                 out['definition'] = defln
 
             # First, check whether the instance docstring is identical to the
             # class one, and print it separately if they don't coincide.  In
             # most cases they will, but it's nice to print all the info for
             # objects which use instance-customized docstrings.
             if ds:
                 try:
                     cls = getattr(obj,'__class__')
                 except:
                     class_ds = None
                 else:
                     class_ds = getdoc(cls)
                 # Skip Python's auto-generated docstrings
                 if class_ds in _builtin_type_docstrings:
                     class_ds = None
                 if class_ds and ds != class_ds:
                     out['class_docstring'] = class_ds
 
             # Next, try to show constructor docstrings
             try:
                 init_ds = getdoc(obj.__init__)
                 # Skip Python's auto-generated docstrings
                 if init_ds == _object_init_docstring:
                     init_ds = None
             except AttributeError:
                 init_ds = None
             if init_ds:
                 out['init_docstring'] = init_ds
 
             # Call form docstring for callable instances
             if safe_hasattr(obj, '__call__') and not is_simple_callable(obj):
                 call_def = self._getdef(obj.__call__, oname)
                 if call_def and (call_def != out.get('definition')):
                     # it may never be the case that call def and definition differ,
                     # but don't include the same signature twice
                     out['call_def'] = call_def
                 call_ds = getdoc(obj.__call__)
                 # Skip Python's auto-generated docstrings
                 if call_ds == _func_call_docstring:
                     call_ds = None
                 if call_ds:
                     out['call_docstring'] = call_ds
 
         return out
 
     @staticmethod
     def _source_contains_docstring(src, doc):
         """
         Check whether the source *src* contains the docstring *doc*.
 
         This is is helper function to skip displaying the docstring if the
         source already contains it, avoiding repetition of information.
         """
         try:
             (def_node,) = ast.parse(dedent(src)).body
             return ast.get_docstring(def_node) == doc  # type: ignore[arg-type]
         except Exception:
             # The source can become invalid or even non-existent (because it
             # is re-fetched from the source file) so the above code fail in
             # arbitrary ways.
             return False
 
     def psearch(self,pattern,ns_table,ns_search=[],
                 ignore_case=False,show_all=False, *, list_types=False):
         """Search namespaces with wildcards for objects.
 
         Arguments:
 
         - pattern: string containing shell-like wildcards to use in namespace
           searches and optionally a type specification to narrow the search to
           objects of that type.
 
         - ns_table: dict of name->namespaces for search.
 
         Optional arguments:
 
           - ns_search: list of namespace names to include in search.
 
           - ignore_case(False): make the search case-insensitive.
 
           - show_all(False): show all names, including those starting with
             underscores.
 
           - list_types(False): list all available object types for object matching.
         """
         # print('ps pattern:<%r>' % pattern)  # dbg
 
         # defaults
         type_pattern = 'all'
         filter = ''
 
         # list all object types
         if list_types:
             page.page('\n'.join(sorted(typestr2type)))
             return
 
         cmds = pattern.split()
         len_cmds  =  len(cmds)
         if len_cmds == 1:
             # Only filter pattern given
             filter = cmds[0]
         elif len_cmds == 2:
             # Both filter and type specified
             filter,type_pattern = cmds
         else:
             raise ValueError('invalid argument string for psearch: <%s>' %
                              pattern)
 
         # filter search namespaces
         for name in ns_search:
             if name not in ns_table:
                 raise ValueError('invalid namespace <%s>. Valid names: %s' %
                                  (name,ns_table.keys()))
 
         # print('type_pattern:',type_pattern)  # dbg
         search_result, namespaces_seen = set(), set()
         for ns_name in ns_search:
             ns = ns_table[ns_name]
             # Normally, locals and globals are the same, so we just check one.
             if id(ns) in namespaces_seen:
                 continue
             namespaces_seen.add(id(ns))
             tmp_res = list_namespace(ns, type_pattern, filter,
                                     ignore_case=ignore_case, show_all=show_all)
             search_result.update(tmp_res)
 
         page.page('\n'.join(sorted(search_result)))
 
 
 def _render_signature(obj_signature, obj_name) -> str:
     """
     This was mostly taken from inspect.Signature.__str__.
     Look there for the comments.
     The only change is to add linebreaks when this gets too long.
     """
     result = []
     pos_only = False
     kw_only = True
     for param in obj_signature.parameters.values():
         if param.kind == inspect.Parameter.POSITIONAL_ONLY:
             pos_only = True
         elif pos_only:
             result.append('/')
             pos_only = False
 
         if param.kind == inspect.Parameter.VAR_POSITIONAL:
             kw_only = False
         elif param.kind == inspect.Parameter.KEYWORD_ONLY and kw_only:
             result.append('*')
             kw_only = False
 
         result.append(str(param))
 
     if pos_only:
         result.append('/')
 
     # add up name, parameters, braces (2), and commas
     if len(obj_name) + sum(len(r) + 2 for r in result) > 75:
         # This doesn’t fit behind “Signature: ” in an inspect window.
         rendered = '{}(\n{})'.format(obj_name, ''.join(
             '    {},\n'.format(r) for r in result)
         )
     else:
         rendered = '{}({})'.format(obj_name, ', '.join(result))
 
     if obj_signature.return_annotation is not inspect._empty:
         anno = inspect.formatannotation(obj_signature.return_annotation)
         rendered += ' -> {}'.format(anno)
 
     return rendered

IPython/terminal/interactiveshell.py

@@ -1,1030 +1,1023
 """IPython terminal interface using prompt_toolkit"""
 
 import os
 import sys
 import inspect
 from warnings import warn
 from typing import Union as UnionType, Optional
 
 from IPython.core.async_helpers import get_asyncio_loop
 from IPython.core.interactiveshell import InteractiveShell, InteractiveShellABC
 from IPython.utils.py3compat import input
 from IPython.utils.terminal import toggle_set_term_title, set_term_title, restore_term_title
 from IPython.utils.process import abbrev_cwd
 from traitlets import (
+    Any,
     Bool,
-    Unicode,
     Dict,
+    Enum,
+    Float,
+    Instance,
     Integer,
     List,
-    observe,
-    Instance,
     Type,
-    default,
-    Enum,
+    Unicode,
     Union,
-    Any,
+    default,
+    observe,
     validate,
-    Float,
 )
 
 from prompt_toolkit.auto_suggest import AutoSuggestFromHistory
 from prompt_toolkit.enums import DEFAULT_BUFFER, EditingMode
 from prompt_toolkit.filters import HasFocus, Condition, IsDone
 from prompt_toolkit.formatted_text import PygmentsTokens
 from prompt_toolkit.history import History
 from prompt_toolkit.layout.processors import ConditionalProcessor, HighlightMatchingBracketProcessor
 from prompt_toolkit.output import ColorDepth
 from prompt_toolkit.patch_stdout import patch_stdout
 from prompt_toolkit.shortcuts import PromptSession, CompleteStyle, print_formatted_text
 from prompt_toolkit.styles import DynamicStyle, merge_styles
 from prompt_toolkit.styles.pygments import style_from_pygments_cls, style_from_pygments_dict
 from prompt_toolkit import __version__ as ptk_version
 
 from pygments.styles import get_style_by_name
 from pygments.style import Style
 from pygments.token import Token
 
 from .debugger import TerminalPdb, Pdb
 from .magics import TerminalMagics
 from .pt_inputhooks import get_inputhook_name_and_func
 from .prompts import Prompts, ClassicPrompts, RichPromptDisplayHook
 from .ptutils import IPythonPTCompleter, IPythonPTLexer
 from .shortcuts import (
     KEY_BINDINGS,
     UNASSIGNED_ALLOWED_COMMANDS,
     create_ipython_shortcuts,
     create_identifier,
     RuntimeBinding,
     add_binding,
 )
 from .shortcuts.filters import KEYBINDING_FILTERS, filter_from_string
 from .shortcuts.auto_suggest import (
     NavigableAutoSuggestFromHistory,
     AppendAutoSuggestionInAnyLine,
 )
 
 PTK3 = ptk_version.startswith('3.')
 
 
 class _NoStyle(Style):
     pass
 
 
 _style_overrides_light_bg = {
             Token.Prompt: '#ansibrightblue',
             Token.PromptNum: '#ansiblue bold',
             Token.OutPrompt: '#ansibrightred',
             Token.OutPromptNum: '#ansired bold',
 }
 
 _style_overrides_linux = {
             Token.Prompt: '#ansibrightgreen',
             Token.PromptNum: '#ansigreen bold',
             Token.OutPrompt: '#ansibrightred',
             Token.OutPromptNum: '#ansired bold',
 }
 
 
 def _backward_compat_continuation_prompt_tokens(method, width: int, *, lineno: int):
     """
     Sagemath use custom prompt and we broke them in 8.19.
     """
     sig = inspect.signature(method)
     if "lineno" in inspect.signature(method).parameters or any(
         [p.kind == p.VAR_KEYWORD for p in sig.parameters.values()]
     ):
         return method(width, lineno=lineno)
     else:
         return method(width)
 
 
 def get_default_editor():
     try:
         return os.environ['EDITOR']
     except KeyError:
         pass
     except UnicodeError:
         warn("$EDITOR environment variable is not pure ASCII. Using platform "
              "default editor.")
 
     if os.name == 'posix':
         return 'vi'  # the only one guaranteed to be there!
     else:
         return "notepad"  # same in Windows!
 
 
 # conservatively check for tty
 # overridden streams can result in things like:
 # - sys.stdin = None
 # - no isatty method
 for _name in ('stdin', 'stdout', 'stderr'):
     _stream = getattr(sys, _name)
     try:
         if not _stream or not hasattr(_stream, "isatty") or not _stream.isatty():
             _is_tty = False
             break
     except ValueError:
         # stream is closed
         _is_tty = False
         break
 else:
     _is_tty = True
 
 
 _use_simple_prompt = ('IPY_TEST_SIMPLE_PROMPT' in os.environ) or (not _is_tty)
 
 def black_reformat_handler(text_before_cursor):
     """
     We do not need to protect against error,
     this is taken care at a higher level where any reformat error is ignored.
     Indeed we may call reformatting on incomplete code.
     """
     import black
 
     formatted_text = black.format_str(text_before_cursor, mode=black.FileMode())
     if not text_before_cursor.endswith("\n") and formatted_text.endswith("\n"):
         formatted_text = formatted_text[:-1]
     return formatted_text
 
 
 def yapf_reformat_handler(text_before_cursor):
     from yapf.yapflib import file_resources
     from yapf.yapflib import yapf_api
 
     style_config = file_resources.GetDefaultStyleForDir(os.getcwd())
     formatted_text, was_formatted = yapf_api.FormatCode(
         text_before_cursor, style_config=style_config
     )
     if was_formatted:
         if not text_before_cursor.endswith("\n") and formatted_text.endswith("\n"):
             formatted_text = formatted_text[:-1]
         return formatted_text
     else:
         return text_before_cursor
 
 
 class PtkHistoryAdapter(History):
     """
     Prompt toolkit has it's own way of handling history, Where it assumes it can
     Push/pull from history.
 
     """
 
     def __init__(self, shell):
         super().__init__()
         self.shell = shell
         self._refresh()
 
     def append_string(self, string):
         # we rely on sql for that.
         self._loaded = False
         self._refresh()
 
     def _refresh(self):
         if not self._loaded:
             self._loaded_strings = list(self.load_history_strings())
 
     def load_history_strings(self):
         last_cell = ""
         res = []
         for __, ___, cell in self.shell.history_manager.get_tail(
             self.shell.history_load_length, include_latest=True
         ):
             # Ignore blank lines and consecutive duplicates
             cell = cell.rstrip()
             if cell and (cell != last_cell):
                 res.append(cell)
                 last_cell = cell
         yield from res[::-1]
 
     def store_string(self, string: str) -> None:
         pass
 
 class TerminalInteractiveShell(InteractiveShell):
     mime_renderers = Dict().tag(config=True)
 
     space_for_menu = Integer(6, help='Number of line at the bottom of the screen '
                                      'to reserve for the tab completion menu, '
                                      'search history, ...etc, the height of '
                                      'these menus will at most this value. '
                                      'Increase it is you prefer long and skinny '
                                      'menus, decrease for short and wide.'
                             ).tag(config=True)
 
     pt_app: UnionType[PromptSession, None] = None
     auto_suggest: UnionType[
         AutoSuggestFromHistory, NavigableAutoSuggestFromHistory, None
     ] = None
     debugger_history = None
 
     debugger_history_file = Unicode(
         "~/.pdbhistory", help="File in which to store and read history"
     ).tag(config=True)
 
     simple_prompt = Bool(_use_simple_prompt,
         help="""Use `raw_input` for the REPL, without completion and prompt colors.
 
             Useful when controlling IPython as a subprocess, and piping
             STDIN/OUT/ERR. Known usage are: IPython's own testing machinery,
             and emacs' inferior-python subprocess (assuming you have set
             `python-shell-interpreter` to "ipython") available through the
             built-in `M-x run-python` and third party packages such as elpy.
 
             This mode default to `True` if the `IPY_TEST_SIMPLE_PROMPT`
             environment variable is set, or the current terminal is not a tty.
             Thus the Default value reported in --help-all, or config will often
             be incorrectly reported.
             """,
     ).tag(config=True)
 
     @property
     def debugger_cls(self):
         return Pdb if self.simple_prompt else TerminalPdb
 
     confirm_exit = Bool(True,
         help="""
         Set to confirm when you try to exit IPython with an EOF (Control-D
         in Unix, Control-Z/Enter in Windows). By typing 'exit' or 'quit',
         you can force a direct exit without any confirmation.""",
     ).tag(config=True)
 
     editing_mode = Unicode('emacs',
         help="Shortcut style to use at the prompt. 'vi' or 'emacs'.",
     ).tag(config=True)
 
     emacs_bindings_in_vi_insert_mode = Bool(
         True,
         help="Add shortcuts from 'emacs' insert mode to 'vi' insert mode.",
     ).tag(config=True)
 
     modal_cursor = Bool(
         True,
         help="""
        Cursor shape changes depending on vi mode: beam in vi insert mode,
        block in nav mode, underscore in replace mode.""",
     ).tag(config=True)
 
     ttimeoutlen = Float(
         0.01,
         help="""The time in milliseconds that is waited for a key code
        to complete.""",
     ).tag(config=True)
 
     timeoutlen = Float(
         0.5,
         help="""The time in milliseconds that is waited for a mapped key
        sequence to complete.""",
     ).tag(config=True)
 
     autoformatter = Unicode(
         None,
         help="Autoformatter to reformat Terminal code. Can be `'black'`, `'yapf'` or `None`",
         allow_none=True
     ).tag(config=True)
 
     auto_match = Bool(
         False,
         help="""
         Automatically add/delete closing bracket or quote when opening bracket or quote is entered/deleted.
         Brackets: (), [], {}
         Quotes: '', \"\"
         """,
     ).tag(config=True)
 
     mouse_support = Bool(False,
         help="Enable mouse support in the prompt\n(Note: prevents selecting text with the mouse)"
     ).tag(config=True)
 
     # We don't load the list of styles for the help string, because loading
     # Pygments plugins takes time and can cause unexpected errors.
     highlighting_style = Union([Unicode('legacy'), Type(klass=Style)],
         help="""The name or class of a Pygments style to use for syntax
         highlighting. To see available styles, run `pygmentize -L styles`."""
     ).tag(config=True)
 
     @validate('editing_mode')
     def _validate_editing_mode(self, proposal):
         if proposal['value'].lower() == 'vim':
             proposal['value']= 'vi'
         elif proposal['value'].lower() == 'default':
             proposal['value']= 'emacs'
 
         if hasattr(EditingMode, proposal['value'].upper()):
             return proposal['value'].lower()
 
         return self.editing_mode
 
     @observe('editing_mode')
     def _editing_mode(self, change):
         if self.pt_app:
             self.pt_app.editing_mode = getattr(EditingMode, change.new.upper())
 
     def _set_formatter(self, formatter):
         if formatter is None:
             self.reformat_handler = lambda x:x
         elif formatter == 'black':
             self.reformat_handler = black_reformat_handler
         elif formatter == "yapf":
             self.reformat_handler = yapf_reformat_handler
         else:
             raise ValueError
 
     @observe("autoformatter")
     def _autoformatter_changed(self, change):
         formatter = change.new
         self._set_formatter(formatter)
 
     @observe('highlighting_style')
     @observe('colors')
     def _highlighting_style_changed(self, change):
         self.refresh_style()
 
     def refresh_style(self):
         self._style = self._make_style_from_name_or_cls(self.highlighting_style)
 
     highlighting_style_overrides = Dict(
         help="Override highlighting format for specific tokens"
     ).tag(config=True)
 
     true_color = Bool(False,
         help="""Use 24bit colors instead of 256 colors in prompt highlighting.
         If your terminal supports true color, the following command should
         print ``TRUECOLOR`` in orange::
 
             printf \"\\x1b[38;2;255;100;0mTRUECOLOR\\x1b[0m\\n\"
         """,
     ).tag(config=True)
 
     editor = Unicode(get_default_editor(),
         help="Set the editor used by IPython (default to $EDITOR/vi/notepad)."
     ).tag(config=True)
 
     prompts_class = Type(Prompts, help='Class used to generate Prompt token for prompt_toolkit').tag(config=True)
 
     prompts = Instance(Prompts)
 
     @default('prompts')
     def _prompts_default(self):
         return self.prompts_class(self)
 
 #    @observe('prompts')
 #    def _(self, change):
 #        self._update_layout()
 
     @default('displayhook_class')
     def _displayhook_class_default(self):
         return RichPromptDisplayHook
 
     term_title = Bool(True,
         help="Automatically set the terminal title"
     ).tag(config=True)
 
     term_title_format = Unicode("IPython: {cwd}",
         help="Customize the terminal title format.  This is a python format string. " +
              "Available substitutions are: {cwd}."
     ).tag(config=True)
 
     display_completions = Enum(('column', 'multicolumn','readlinelike'),
         help= ( "Options for displaying tab completions, 'column', 'multicolumn', and "
                 "'readlinelike'. These options are for `prompt_toolkit`, see "
                 "`prompt_toolkit` documentation for more information."
                 ),
         default_value='multicolumn').tag(config=True)
 
     highlight_matching_brackets = Bool(True,
         help="Highlight matching brackets.",
     ).tag(config=True)
 
     extra_open_editor_shortcuts = Bool(False,
         help="Enable vi (v) or Emacs (C-X C-E) shortcuts to open an external editor. "
              "This is in addition to the F2 binding, which is always enabled."
     ).tag(config=True)
 
     handle_return = Any(None,
         help="Provide an alternative handler to be called when the user presses "
              "Return. This is an advanced option intended for debugging, which "
              "may be changed or removed in later releases."
     ).tag(config=True)
 
     enable_history_search = Bool(True,
         help="Allows to enable/disable the prompt toolkit history search"
     ).tag(config=True)
 
     autosuggestions_provider = Unicode(
         "NavigableAutoSuggestFromHistory",
         help="Specifies from which source automatic suggestions are provided. "
         "Can be set to ``'NavigableAutoSuggestFromHistory'`` (:kbd:`up` and "
         ":kbd:`down` swap suggestions), ``'AutoSuggestFromHistory'``, "
         " or ``None`` to disable automatic suggestions. "
         "Default is `'NavigableAutoSuggestFromHistory`'.",
         allow_none=True,
     ).tag(config=True)
 
     def _set_autosuggestions(self, provider):
         # disconnect old handler
         if self.auto_suggest and isinstance(
             self.auto_suggest, NavigableAutoSuggestFromHistory
         ):
             self.auto_suggest.disconnect()
         if provider is None:
             self.auto_suggest = None
         elif provider == "AutoSuggestFromHistory":
             self.auto_suggest = AutoSuggestFromHistory()
         elif provider == "NavigableAutoSuggestFromHistory":
             self.auto_suggest = NavigableAutoSuggestFromHistory()
         else:
             raise ValueError("No valid provider.")
         if self.pt_app:
             self.pt_app.auto_suggest = self.auto_suggest
 
     @observe("autosuggestions_provider")
     def _autosuggestions_provider_changed(self, change):
         provider = change.new
         self._set_autosuggestions(provider)
 
     shortcuts = List(
         trait=Dict(
             key_trait=Enum(
                 [
                     "command",
                     "match_keys",
                     "match_filter",
                     "new_keys",
                     "new_filter",
                     "create",
                 ]
             ),
             per_key_traits={
                 "command": Unicode(),
                 "match_keys": List(Unicode()),
                 "match_filter": Unicode(),
                 "new_keys": List(Unicode()),
                 "new_filter": Unicode(),
                 "create": Bool(False),
             },
         ),
         help="""Add, disable or modifying shortcuts.
 
         Each entry on the list should be a dictionary with ``command`` key
         identifying the target function executed by the shortcut and at least
         one of the following:
 
         - ``match_keys``: list of keys used to match an existing shortcut,
         - ``match_filter``: shortcut filter used to match an existing shortcut,
         - ``new_keys``: list of keys to set,
         - ``new_filter``: a new shortcut filter to set
 
         The filters have to be composed of pre-defined verbs and joined by one
         of the following conjunctions: ``&`` (and), ``|`` (or), ``~`` (not).
         The pre-defined verbs are:
 
         {}
 
 
         To disable a shortcut set ``new_keys`` to an empty list.
         To add a shortcut add key ``create`` with value ``True``.
 
         When modifying/disabling shortcuts, ``match_keys``/``match_filter`` can
         be omitted if the provided specification uniquely identifies a shortcut
         to be modified/disabled. When modifying a shortcut ``new_filter`` or
         ``new_keys`` can be omitted which will result in reuse of the existing
         filter/keys.
 
         Only shortcuts defined in IPython (and not default prompt-toolkit
         shortcuts) can be modified or disabled. The full list of shortcuts,
         command identifiers and filters is available under
         :ref:`terminal-shortcuts-list`.
         """.format(
             "\n        ".join([f"- `{k}`" for k in KEYBINDING_FILTERS])
         ),
     ).tag(config=True)
 
     @observe("shortcuts")
     def _shortcuts_changed(self, change):
         if self.pt_app:
             self.pt_app.key_bindings = self._merge_shortcuts(user_shortcuts=change.new)
 
     def _merge_shortcuts(self, user_shortcuts):
         # rebuild the bindings list from scratch
         key_bindings = create_ipython_shortcuts(self)
 
         # for now we only allow adding shortcuts for a specific set of
         # commands; this is a security precution.
         allowed_commands = {
             create_identifier(binding.command): binding.command
             for binding in KEY_BINDINGS
         }
         allowed_commands.update(
             {
                 create_identifier(command): command
                 for command in UNASSIGNED_ALLOWED_COMMANDS
             }
         )
         shortcuts_to_skip = []
         shortcuts_to_add = []
 
         for shortcut in user_shortcuts:
             command_id = shortcut["command"]
             if command_id not in allowed_commands:
                 allowed_commands = "\n - ".join(allowed_commands)
                 raise ValueError(
                     f"{command_id} is not a known shortcut command."
                     f" Allowed commands are: \n - {allowed_commands}"
                 )
             old_keys = shortcut.get("match_keys", None)
             old_filter = (
                 filter_from_string(shortcut["match_filter"])
                 if "match_filter" in shortcut
                 else None
             )
             matching = [
                 binding
                 for binding in KEY_BINDINGS
                 if (
                     (old_filter is None or binding.filter == old_filter)
                     and (old_keys is None or [k for k in binding.keys] == old_keys)
                     and create_identifier(binding.command) == command_id
                 )
             ]
 
             new_keys = shortcut.get("new_keys", None)
             new_filter = shortcut.get("new_filter", None)
 
             command = allowed_commands[command_id]
 
             creating_new = shortcut.get("create", False)
             modifying_existing = not creating_new and (
                 new_keys is not None or new_filter
             )
 
             if creating_new and new_keys == []:
                 raise ValueError("Cannot add a shortcut without keys")
 
             if modifying_existing:
                 specification = {
                     key: shortcut[key]
                     for key in ["command", "filter"]
                     if key in shortcut
                 }
                 if len(matching) == 0:
                     raise ValueError(
                         f"No shortcuts matching {specification} found in {KEY_BINDINGS}"
                     )
                 elif len(matching) > 1:
                     raise ValueError(
                         f"Multiple shortcuts matching {specification} found,"
                         f" please add keys/filter to select one of: {matching}"
                     )
 
                 matched = matching[0]
                 old_filter = matched.filter
                 old_keys = list(matched.keys)
                 shortcuts_to_skip.append(
                     RuntimeBinding(
                         command,
                         keys=old_keys,
                         filter=old_filter,
                     )
                 )
 
             if new_keys != []:
                 shortcuts_to_add.append(
                     RuntimeBinding(
                         command,
                         keys=new_keys or old_keys,
                         filter=(
                             filter_from_string(new_filter)
                             if new_filter is not None
                             else (
                                 old_filter
                                 if old_filter is not None
                                 else filter_from_string("always")
                             )
                         ),
                     )
                 )
 
         # rebuild the bindings list from scratch
         key_bindings = create_ipython_shortcuts(self, skip=shortcuts_to_skip)
         for binding in shortcuts_to_add:
             add_binding(key_bindings, binding)
 
         return key_bindings
 
     prompt_includes_vi_mode = Bool(True,
         help="Display the current vi mode (when using vi editing mode)."
     ).tag(config=True)
 
     prompt_line_number_format = Unicode(
         "",
         help="The format for line numbering, will be passed `line` (int, 1 based)"
         " the current line number and `rel_line` the relative line number."
         " for example to display both you can use the following template string :"
         " c.TerminalInteractiveShell.prompt_line_number_format='{line: 4d}/{rel_line:+03d} | '"
         " This will display the current line number, with leading space and a width of at least 4"
         " character, as well as the relative line number 0 padded and always with a + or - sign."
         " Note that when using Emacs mode the prompt of the first line may not update.",
     ).tag(config=True)
 
     @observe('term_title')
     def init_term_title(self, change=None):
         # Enable or disable the terminal title.
         if self.term_title and _is_tty:
             toggle_set_term_title(True)
             set_term_title(self.term_title_format.format(cwd=abbrev_cwd()))
         else:
             toggle_set_term_title(False)
 
     def restore_term_title(self):
         if self.term_title and _is_tty:
             restore_term_title()
 
     def init_display_formatter(self):
         super(TerminalInteractiveShell, self).init_display_formatter()
         # terminal only supports plain text
         self.display_formatter.active_types = ["text/plain"]
 
     def init_prompt_toolkit_cli(self):
         if self.simple_prompt:
             # Fall back to plain non-interactive output for tests.
             # This is very limited.
             def prompt():
                 prompt_text = "".join(x[1] for x in self.prompts.in_prompt_tokens())
                 lines = [input(prompt_text)]
                 prompt_continuation = "".join(x[1] for x in self.prompts.continuation_prompt_tokens())
                 while self.check_complete('\n'.join(lines))[0] == 'incomplete':
                     lines.append( input(prompt_continuation) )
                 return '\n'.join(lines)
             self.prompt_for_code = prompt
             return
 
         # Set up keyboard shortcuts
         key_bindings = self._merge_shortcuts(user_shortcuts=self.shortcuts)
 
         # Pre-populate history from IPython's history database
         history = PtkHistoryAdapter(self)
 
         self._style = self._make_style_from_name_or_cls(self.highlighting_style)
         self.style = DynamicStyle(lambda: self._style)
 
         editing_mode = getattr(EditingMode, self.editing_mode.upper())
 
         self._use_asyncio_inputhook = False
         self.pt_app = PromptSession(
             auto_suggest=self.auto_suggest,
             editing_mode=editing_mode,
             key_bindings=key_bindings,
             history=history,
             completer=IPythonPTCompleter(shell=self),
             enable_history_search=self.enable_history_search,
             style=self.style,
             include_default_pygments_style=False,
             mouse_support=self.mouse_support,
             enable_open_in_editor=self.extra_open_editor_shortcuts,
             color_depth=self.color_depth,
             tempfile_suffix=".py",
             **self._extra_prompt_options(),
         )
         if isinstance(self.auto_suggest, NavigableAutoSuggestFromHistory):
             self.auto_suggest.connect(self.pt_app)
 
     def _make_style_from_name_or_cls(self, name_or_cls):
         """
         Small wrapper that make an IPython compatible style from a style name
 
         We need that to add style for prompt ... etc.
         """
         style_overrides = {}
         if name_or_cls == 'legacy':
             legacy = self.colors.lower()
             if legacy == 'linux':
                 style_cls = get_style_by_name('monokai')
                 style_overrides = _style_overrides_linux
             elif legacy == 'lightbg':
                 style_overrides = _style_overrides_light_bg
                 style_cls = get_style_by_name('pastie')
             elif legacy == 'neutral':
                 # The default theme needs to be visible on both a dark background
                 # and a light background, because we can't tell what the terminal
                 # looks like. These tweaks to the default theme help with that.
                 style_cls = get_style_by_name('default')
                 style_overrides.update({
                     Token.Number: '#ansigreen',
                     Token.Operator: 'noinherit',
                     Token.String: '#ansiyellow',
                     Token.Name.Function: '#ansiblue',
                     Token.Name.Class: 'bold #ansiblue',
                     Token.Name.Namespace: 'bold #ansiblue',
                     Token.Name.Variable.Magic: '#ansiblue',
                     Token.Prompt: '#ansigreen',
                     Token.PromptNum: '#ansibrightgreen bold',
                     Token.OutPrompt: '#ansired',
                     Token.OutPromptNum: '#ansibrightred bold',
                 })
 
                 # Hack: Due to limited color support on the Windows console
                 # the prompt colors will be wrong without this
                 if os.name == 'nt':
                     style_overrides.update({
                         Token.Prompt: '#ansidarkgreen',
                         Token.PromptNum: '#ansigreen bold',
                         Token.OutPrompt: '#ansidarkred',
                         Token.OutPromptNum: '#ansired bold',
                     })
             elif legacy =='nocolor':
                 style_cls=_NoStyle
                 style_overrides = {}
             else :
                 raise ValueError('Got unknown colors: ', legacy)
         else :
             if isinstance(name_or_cls, str):
                 style_cls = get_style_by_name(name_or_cls)
             else:
                 style_cls = name_or_cls
             style_overrides = {
                 Token.Prompt: '#ansigreen',
                 Token.PromptNum: '#ansibrightgreen bold',
                 Token.OutPrompt: '#ansired',
                 Token.OutPromptNum: '#ansibrightred bold',
             }
         style_overrides.update(self.highlighting_style_overrides)
         style = merge_styles([
             style_from_pygments_cls(style_cls),
             style_from_pygments_dict(style_overrides),
         ])
 
         return style
 
     @property
     def pt_complete_style(self):
         return {
             'multicolumn': CompleteStyle.MULTI_COLUMN,
             'column': CompleteStyle.COLUMN,
             'readlinelike': CompleteStyle.READLINE_LIKE,
         }[self.display_completions]
 
     @property
     def color_depth(self):
         return (ColorDepth.TRUE_COLOR if self.true_color else None)
 
     def _extra_prompt_options(self):
         """
         Return the current layout option for the current Terminal InteractiveShell
         """
         def get_message():
             return PygmentsTokens(self.prompts.in_prompt_tokens())
 
         if self.editing_mode == "emacs" and self.prompt_line_number_format == "":
             # with emacs mode the prompt is (usually) static, so we call only
             # the function once. With VI mode it can toggle between [ins] and
             # [nor] so we can't precompute.
             # here I'm going to favor the default keybinding which almost
             # everybody uses to decrease CPU usage.
             # if we have issues with users with custom Prompts we can see how to
             # work around this.
             get_message = get_message()
 
         options = {
             "complete_in_thread": False,
             "lexer": IPythonPTLexer(),
             "reserve_space_for_menu": self.space_for_menu,
             "message": get_message,
             "prompt_continuation": (
                 lambda width, lineno, is_soft_wrap: PygmentsTokens(
                     _backward_compat_continuation_prompt_tokens(
                         self.prompts.continuation_prompt_tokens, width, lineno=lineno
                     )
                 )
             ),
             "multiline": True,
             "complete_style": self.pt_complete_style,
             "input_processors": [
                 # Highlight matching brackets, but only when this setting is
                 # enabled, and only when the DEFAULT_BUFFER has the focus.
                 ConditionalProcessor(
                     processor=HighlightMatchingBracketProcessor(chars="[](){}"),
                     filter=HasFocus(DEFAULT_BUFFER)
                     & ~IsDone()
                     & Condition(lambda: self.highlight_matching_brackets),
                 ),
                 # Show auto-suggestion in lines other than the last line.
                 ConditionalProcessor(
                     processor=AppendAutoSuggestionInAnyLine(),
                     filter=HasFocus(DEFAULT_BUFFER)
                     & ~IsDone()
                     & Condition(
                         lambda: isinstance(
                             self.auto_suggest, NavigableAutoSuggestFromHistory
                         )
                     ),
                 ),
             ],
         }
         if not PTK3:
             options['inputhook'] = self.inputhook
 
         return options
 
     def prompt_for_code(self):
         if self.rl_next_input:
             default = self.rl_next_input
             self.rl_next_input = None
         else:
             default = ''
 
         # In order to make sure that asyncio code written in the
         # interactive shell doesn't interfere with the prompt, we run the
         # prompt in a different event loop.
         # If we don't do this, people could spawn coroutine with a
         # while/true inside which will freeze the prompt.
 
         with patch_stdout(raw=True):
             if self._use_asyncio_inputhook:
                 # When we integrate the asyncio event loop, run the UI in the
                 # same event loop as the rest of the code. don't use an actual
                 # input hook. (Asyncio is not made for nesting event loops.)
                 asyncio_loop = get_asyncio_loop()
                 text = asyncio_loop.run_until_complete(
                     self.pt_app.prompt_async(
                         default=default, **self._extra_prompt_options()
                     )
                 )
             else:
                 text = self.pt_app.prompt(
                     default=default,
                     inputhook=self._inputhook,
                     **self._extra_prompt_options(),
                 )
 
         return text
 
-    def enable_win_unicode_console(self):
-        # Since IPython 7.10 doesn't support python < 3.6 and PEP 528, Python uses the unicode APIs for the Windows
-        # console by default, so WUC shouldn't be needed.
-        warn("`enable_win_unicode_console` is deprecated since IPython 7.10, does not do anything and will be removed in the future",
-             DeprecationWarning,
-             stacklevel=2)
-
     def init_io(self):
         if sys.platform not in {'win32', 'cli'}:
             return
 
         import colorama
         colorama.init()
 
     def init_magics(self):
         super(TerminalInteractiveShell, self).init_magics()
         self.register_magics(TerminalMagics)
 
     def init_alias(self):
         # The parent class defines aliases that can be safely used with any
         # frontend.
         super(TerminalInteractiveShell, self).init_alias()
 
         # Now define aliases that only make sense on the terminal, because they
         # need direct access to the console in a way that we can't emulate in
         # GUI or web frontend
         if os.name == 'posix':
             for cmd in ('clear', 'more', 'less', 'man'):
                 self.alias_manager.soft_define_alias(cmd, cmd)
 
     def __init__(self, *args, **kwargs) -> None:
         super(TerminalInteractiveShell, self).__init__(*args, **kwargs)
         self._set_autosuggestions(self.autosuggestions_provider)
         self.init_prompt_toolkit_cli()
         self.init_term_title()
         self.keep_running = True
         self._set_formatter(self.autoformatter)
 
     def ask_exit(self):
         self.keep_running = False
 
     rl_next_input = None
 
     def interact(self):
         self.keep_running = True
         while self.keep_running:
             print(self.separate_in, end='')
 
             try:
                 code = self.prompt_for_code()
             except EOFError:
                 if (not self.confirm_exit) \
                         or self.ask_yes_no('Do you really want to exit ([y]/n)?','y','n'):
                     self.ask_exit()
 
             else:
                 if code:
                     self.run_cell(code, store_history=True)
 
     def mainloop(self):
         # An extra layer of protection in case someone mashing Ctrl-C breaks
         # out of our internal code.
         while True:
             try:
                 self.interact()
                 break
             except KeyboardInterrupt as e:
                 print("\n%s escaped interact()\n" % type(e).__name__)
             finally:
                 # An interrupt during the eventloop will mess up the
                 # internal state of the prompt_toolkit library.
                 # Stopping the eventloop fixes this, see
                 # https://github.com/ipython/ipython/pull/9867
                 if hasattr(self, '_eventloop'):
                     self._eventloop.stop()
 
                 self.restore_term_title()
 
         # try to call some at-exit operation optimistically as some things can't
         # be done during interpreter shutdown. this is technically inaccurate as
         # this make mainlool not re-callable, but that should be a rare if not
         # in existent use case.
 
         self._atexit_once()
 
     _inputhook = None
     def inputhook(self, context):
         if self._inputhook is not None:
             self._inputhook(context)
 
     active_eventloop: Optional[str] = None
 
     def enable_gui(self, gui: Optional[str] = None) -> None:
         if gui:
             from ..core.pylabtools import _convert_gui_from_matplotlib
 
             gui = _convert_gui_from_matplotlib(gui)
 
         if self.simple_prompt is True and gui is not None:
             print(
                 f'Cannot install event loop hook for "{gui}" when running with `--simple-prompt`.'
             )
             print(
                 "NOTE: Tk is supported natively; use Tk apps and Tk backends with `--simple-prompt`."
             )
             return
 
         if self._inputhook is None and gui is None:
             print("No event loop hook running.")
             return
 
         if self._inputhook is not None and gui is not None:
             newev, newinhook = get_inputhook_name_and_func(gui)
             if self._inputhook == newinhook:
                 # same inputhook, do nothing
                 self.log.info(
                     f"Shell is already running the {self.active_eventloop} eventloop. Doing nothing"
                 )
                 return
             self.log.warning(
                 f"Shell is already running a different gui event loop for {self.active_eventloop}. "
                 "Call with no arguments to disable the current loop."
             )
             return
         if self._inputhook is not None and gui is None:
             self.active_eventloop = self._inputhook = None
 
         if gui and (gui not in {None, "webagg"}):
             # This hook runs with each cycle of the `prompt_toolkit`'s event loop.
             self.active_eventloop, self._inputhook = get_inputhook_name_and_func(gui)
         else:
             self.active_eventloop = self._inputhook = None
 
         self._use_asyncio_inputhook = gui == "asyncio"
 
     # Run !system commands directly, not through pipes, so terminal programs
     # work correctly.
     system = InteractiveShell.system_raw
 
     def auto_rewrite_input(self, cmd):
         """Overridden from the parent class to use fancy rewriting prompt"""
         if not self.show_rewritten_input:
             return
 
         tokens = self.prompts.rewrite_prompt_tokens()
         if self.pt_app:
             print_formatted_text(PygmentsTokens(tokens), end='',
                                  style=self.pt_app.app.style)
             print(cmd)
         else:
             prompt = ''.join(s for t, s in tokens)
             print(prompt, cmd, sep='')
 
     _prompts_before = None
     def switch_doctest_mode(self, mode):
         """Switch prompts to classic for %doctest_mode"""
         if mode:
             self._prompts_before = self.prompts
             self.prompts = ClassicPrompts(self)
         elif self._prompts_before:
             self.prompts = self._prompts_before
             self._prompts_before = None
 #        self._update_layout()
 
 
 InteractiveShellABC.register(TerminalInteractiveShell)
 
 if __name__ == '__main__':
     TerminalInteractiveShell.instance().interact()