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"""Tools for inspecting Python objects.
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Uses syntax highlighting for presenting the various information elements.
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Similar in spirit to the inspect module, but all calls take a name argument to
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reference the name under which an object is being read.
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"""
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# Copyright (c) IPython Development Team.
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# Distributed under the terms of the Modified BSD License.
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__all__ = ['Inspector','InspectColors']
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# stdlib modules
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from dataclasses import dataclass
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from inspect import signature
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from textwrap import dedent
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import ast
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import html
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import inspect
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import io as stdlib_io
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import linecache
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import os
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import types
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import warnings
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from typing import (
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cast,
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Any,
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Optional,
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Dict,
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Union,
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List,
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TypedDict,
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TypeAlias,
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Tuple,
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)
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import traitlets
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# IPython's own
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from IPython.core import page
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from IPython.lib.pretty import pretty
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from IPython.testing.skipdoctest import skip_doctest
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from IPython.utils import PyColorize, openpy
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from IPython.utils.dir2 import safe_hasattr
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from IPython.utils.path import compress_user
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from IPython.utils.text import indent
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from IPython.utils.wildcard import list_namespace, typestr2type
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from IPython.utils.coloransi import TermColors
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from IPython.utils.colorable import Colorable
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from IPython.utils.decorators import undoc
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from pygments import highlight
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from pygments.lexers import PythonLexer
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from pygments.formatters import HtmlFormatter
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HOOK_NAME = "__custom_documentations__"
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UnformattedBundle: TypeAlias = Dict[str, List[Tuple[str, str]]] # List of (title, body)
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Bundle: TypeAlias = Dict[str, str]
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@dataclass
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class OInfo:
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ismagic: bool
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isalias: bool
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found: bool
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namespace: Optional[str]
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parent: Any
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obj: Any
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def get(self, field):
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"""Get a field from the object for backward compatibility with before 8.12
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see https://github.com/h5py/h5py/issues/2253
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"""
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# We need to deprecate this at some point, but the warning will show in completion.
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# Let's comment this for now and uncomment end of 2023 ish
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# warnings.warn(
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# f"OInfo dataclass with fields access since IPython 8.12 please use OInfo.{field} instead."
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# "OInfo used to be a dict but a dataclass provide static fields verification with mypy."
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# "This warning and backward compatibility `get()` method were added in 8.13.",
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# DeprecationWarning,
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# stacklevel=2,
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# )
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return getattr(self, field)
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def pylight(code):
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return highlight(code, PythonLexer(), HtmlFormatter(noclasses=True))
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# builtin docstrings to ignore
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_func_call_docstring = types.FunctionType.__call__.__doc__
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_object_init_docstring = object.__init__.__doc__
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_builtin_type_docstrings = {
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inspect.getdoc(t) for t in (types.ModuleType, types.MethodType,
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types.FunctionType, property)
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}
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_builtin_func_type = type(all)
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_builtin_meth_type = type(str.upper) # Bound methods have the same type as builtin functions
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#****************************************************************************
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# Builtin color schemes
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Colors = TermColors # just a shorthand
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InspectColors = PyColorize.ANSICodeColors
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#****************************************************************************
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# Auxiliary functions and objects
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class InfoDict(TypedDict):
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type_name: Optional[str]
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base_class: Optional[str]
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string_form: Optional[str]
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namespace: Optional[str]
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length: Optional[str]
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file: Optional[str]
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definition: Optional[str]
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docstring: Optional[str]
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source: Optional[str]
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init_definition: Optional[str]
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class_docstring: Optional[str]
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init_docstring: Optional[str]
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call_def: Optional[str]
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call_docstring: Optional[str]
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subclasses: Optional[str]
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# These won't be printed but will be used to determine how to
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# format the object
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ismagic: bool
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isalias: bool
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isclass: bool
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found: bool
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name: str
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_info_fields = list(InfoDict.__annotations__.keys())
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def __getattr__(name):
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if name == "info_fields":
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warnings.warn(
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"IPython.core.oinspect's `info_fields` is considered for deprecation and may be removed in the Future. ",
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DeprecationWarning,
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stacklevel=2,
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)
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return _info_fields
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raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
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@dataclass
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class InspectorHookData:
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"""Data passed to the mime hook"""
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obj: Any
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info: Optional[OInfo]
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info_dict: InfoDict
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detail_level: int
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omit_sections: list[str]
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@undoc
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def object_info(
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*,
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name: str,
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found: bool,
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isclass: bool = False,
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isalias: bool = False,
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ismagic: bool = False,
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**kw,
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) -> InfoDict:
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"""Make an object info dict with all fields present."""
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infodict = kw
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infodict = {k: None for k in _info_fields if k not in infodict}
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infodict["name"] = name # type: ignore
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infodict["found"] = found # type: ignore
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infodict["isclass"] = isclass # type: ignore
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infodict["isalias"] = isalias # type: ignore
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infodict["ismagic"] = ismagic # type: ignore
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return InfoDict(**infodict) # type:ignore
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def get_encoding(obj):
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"""Get encoding for python source file defining obj
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Returns None if obj is not defined in a sourcefile.
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"""
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ofile = find_file(obj)
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# run contents of file through pager starting at line where the object
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# is defined, as long as the file isn't binary and is actually on the
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# filesystem.
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if ofile is None:
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return None
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elif ofile.endswith(('.so', '.dll', '.pyd')):
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return None
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elif not os.path.isfile(ofile):
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return None
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else:
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# Print only text files, not extension binaries. Note that
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# getsourcelines returns lineno with 1-offset and page() uses
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# 0-offset, so we must adjust.
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with stdlib_io.open(ofile, 'rb') as buffer: # Tweaked to use io.open for Python 2
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encoding, _lines = openpy.detect_encoding(buffer.readline)
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return encoding
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def getdoc(obj) -> Union[str, None]:
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"""Stable wrapper around inspect.getdoc.
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This can't crash because of attribute problems.
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It also attempts to call a getdoc() method on the given object. This
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allows objects which provide their docstrings via non-standard mechanisms
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(like Pyro proxies) to still be inspected by ipython's ? system.
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"""
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# Allow objects to offer customized documentation via a getdoc method:
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try:
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ds = obj.getdoc()
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except Exception:
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pass
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else:
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if isinstance(ds, str):
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return inspect.cleandoc(ds)
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docstr = inspect.getdoc(obj)
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return docstr
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def getsource(obj, oname='') -> Union[str,None]:
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"""Wrapper around inspect.getsource.
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This can be modified by other projects to provide customized source
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extraction.
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Parameters
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----------
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obj : object
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an object whose source code we will attempt to extract
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oname : str
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(optional) a name under which the object is known
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Returns
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-------
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src : unicode or None
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"""
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if isinstance(obj, property):
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sources = []
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for attrname in ['fget', 'fset', 'fdel']:
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fn = getattr(obj, attrname)
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if fn is not None:
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encoding = get_encoding(fn)
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oname_prefix = ('%s.' % oname) if oname else ''
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sources.append(''.join(('# ', oname_prefix, attrname)))
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if inspect.isfunction(fn):
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_src = getsource(fn)
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if _src:
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# assert _src is not None, "please mypy"
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sources.append(dedent(_src))
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else:
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# Default str/repr only prints function name,
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# pretty.pretty prints module name too.
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sources.append(
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'%s%s = %s\n' % (oname_prefix, attrname, pretty(fn))
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)
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if sources:
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return '\n'.join(sources)
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else:
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return None
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else:
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# Get source for non-property objects.
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obj = _get_wrapped(obj)
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try:
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src = inspect.getsource(obj)
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except TypeError:
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# The object itself provided no meaningful source, try looking for
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# its class definition instead.
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try:
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src = inspect.getsource(obj.__class__)
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except (OSError, TypeError):
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return None
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except OSError:
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return None
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return src
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def is_simple_callable(obj):
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"""True if obj is a function ()"""
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return (inspect.isfunction(obj) or inspect.ismethod(obj) or \
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isinstance(obj, _builtin_func_type) or isinstance(obj, _builtin_meth_type))
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@undoc
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def getargspec(obj):
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"""Wrapper around :func:`inspect.getfullargspec`
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In addition to functions and methods, this can also handle objects with a
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``__call__`` attribute.
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DEPRECATED: Deprecated since 7.10. Do not use, will be removed.
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"""
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warnings.warn('`getargspec` function is deprecated as of IPython 7.10'
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'and will be removed in future versions.', DeprecationWarning, stacklevel=2)
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if safe_hasattr(obj, '__call__') and not is_simple_callable(obj):
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obj = obj.__call__
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return inspect.getfullargspec(obj)
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@undoc
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def format_argspec(argspec):
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"""Format argspect, convenience wrapper around inspect's.
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This takes a dict instead of ordered arguments and calls
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inspect.format_argspec with the arguments in the necessary order.
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DEPRECATED (since 7.10): Do not use; will be removed in future versions.
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"""
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warnings.warn('`format_argspec` function is deprecated as of IPython 7.10'
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'and will be removed in future versions.', DeprecationWarning, stacklevel=2)
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return inspect.formatargspec(argspec['args'], argspec['varargs'],
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argspec['varkw'], argspec['defaults'])
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@undoc
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def call_tip(oinfo, format_call=True):
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"""DEPRECATED since 6.0. Extract call tip data from an oinfo dict."""
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warnings.warn(
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"`call_tip` function is deprecated as of IPython 6.0"
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"and will be removed in future versions.",
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DeprecationWarning,
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stacklevel=2,
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)
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# Get call definition
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argspec = oinfo.get('argspec')
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if argspec is None:
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call_line = None
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else:
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# Callable objects will have 'self' as their first argument, prune
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# it out if it's there for clarity (since users do *not* pass an
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# extra first argument explicitly).
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try:
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has_self = argspec['args'][0] == 'self'
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except (KeyError, IndexError):
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pass
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else:
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if has_self:
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argspec['args'] = argspec['args'][1:]
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call_line = oinfo['name']+format_argspec(argspec)
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# Now get docstring.
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# The priority is: call docstring, constructor docstring, main one.
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doc = oinfo.get('call_docstring')
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if doc is None:
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doc = oinfo.get('init_docstring')
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if doc is None:
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doc = oinfo.get('docstring','')
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return call_line, doc
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def _get_wrapped(obj):
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"""Get the original object if wrapped in one or more @decorators
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Some objects automatically construct similar objects on any unrecognised
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attribute access (e.g. unittest.mock.call). To protect against infinite loops,
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this will arbitrarily cut off after 100 levels of obj.__wrapped__
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attribute access. --TK, Jan 2016
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"""
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orig_obj = obj
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i = 0
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while safe_hasattr(obj, '__wrapped__'):
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obj = obj.__wrapped__
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i += 1
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if i > 100:
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# __wrapped__ is probably a lie, so return the thing we started with
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return orig_obj
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return obj
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def find_file(obj) -> Optional[str]:
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"""Find the absolute path to the file where an object was defined.
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This is essentially a robust wrapper around `inspect.getabsfile`.
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Returns None if no file can be found.
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Parameters
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----------
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obj : any Python object
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Returns
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-------
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fname : str
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The absolute path to the file where the object was defined.
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"""
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obj = _get_wrapped(obj)
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fname: Optional[str] = None
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try:
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fname = inspect.getabsfile(obj)
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except TypeError:
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# For an instance, the file that matters is where its class was
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# declared.
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try:
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fname = inspect.getabsfile(obj.__class__)
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except (OSError, TypeError):
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# Can happen for builtins
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pass
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except OSError:
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pass
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return fname
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def find_source_lines(obj):
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"""Find the line number in a file where an object was defined.
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This is essentially a robust wrapper around `inspect.getsourcelines`.
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Returns None if no file can be found.
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Parameters
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----------
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obj : any Python object
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Returns
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-------
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lineno : int
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The line number where the object definition starts.
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"""
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obj = _get_wrapped(obj)
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try:
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lineno = inspect.getsourcelines(obj)[1]
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except TypeError:
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# For instances, try the class object like getsource() does
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try:
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lineno = inspect.getsourcelines(obj.__class__)[1]
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except (OSError, TypeError):
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return None
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except OSError:
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return None
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return lineno
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|
|
class Inspector(Colorable):
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mime_hooks = traitlets.Dict(
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config=True,
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help="dictionary of mime to callable to add information into help mimebundle dict",
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).tag(config=True)
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|
def __init__(
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self,
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color_table=InspectColors,
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code_color_table=PyColorize.ANSICodeColors,
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scheme=None,
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str_detail_level=0,
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parent=None,
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config=None,
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):
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super(Inspector, self).__init__(parent=parent, config=config)
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|
|
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.
|
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Parameters
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----------
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obj : any
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An object to find information about
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oname : str (default: '')
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Name of the variable pointing to `obj`.
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info : (default: None)
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A struct (dict like with attr access) with some information fields
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which may have been precomputed already.
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detail_level : int (default:0)
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If set to 1, more information is given.
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Returns
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-------
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An object info dict with known fields from `info_fields` (see `InfoDict`).
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"""
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if info is None:
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ismagic = False
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isalias = False
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ospace = ''
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else:
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ismagic = info.ismagic
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isalias = info.isalias
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ospace = info.namespace
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# Get docstring, special-casing aliases:
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att_name = oname.split(".")[-1]
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parents_docs = None
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prelude = ""
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if info and info.parent is not None and hasattr(info.parent, HOOK_NAME):
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parents_docs_dict = getattr(info.parent, HOOK_NAME)
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parents_docs = parents_docs_dict.get(att_name, None)
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out: InfoDict = cast(
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InfoDict,
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{
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**{field: None for field in _info_fields},
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**{
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"name": oname,
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"found": True,
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"isalias": isalias,
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"ismagic": ismagic,
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"subclasses": None,
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},
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},
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)
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if parents_docs:
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ds = parents_docs
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elif isalias:
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if not callable(obj):
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try:
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ds = "Alias to the system command:\n %s" % obj[1]
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except:
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ds = "Alias: " + str(obj)
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else:
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ds = "Alias to " + str(obj)
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if obj.__doc__:
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ds += "\nDocstring:\n" + obj.__doc__
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else:
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ds_or_None = getdoc(obj)
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if ds_or_None is None:
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ds = '<no docstring>'
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else:
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ds = ds_or_None
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ds = prelude + ds
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# store output in a dict, we initialize it here and fill it as we go
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string_max = 200 # max size of strings to show (snipped if longer)
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shalf = int((string_max - 5) / 2)
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if ismagic:
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out['type_name'] = 'Magic function'
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elif isalias:
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out['type_name'] = 'System alias'
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else:
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out['type_name'] = type(obj).__name__
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try:
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bclass = obj.__class__
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out['base_class'] = str(bclass)
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except:
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pass
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# String form, but snip if too long in ? form (full in ??)
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if detail_level >= self.str_detail_level:
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try:
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ostr = str(obj)
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if not detail_level and len(ostr) > string_max:
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ostr = ostr[:shalf] + ' <...> ' + ostr[-shalf:]
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# TODO: `'string_form'.expandtabs()` seems wrong, but
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# it was (nearly) like this since the first commit ever.
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ostr = ("\n" + " " * len("string_form".expandtabs())).join(
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q.strip() for q in ostr.split("\n")
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)
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out["string_form"] = ostr
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except:
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pass
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if ospace:
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out['namespace'] = ospace
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# Length (for strings and lists)
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try:
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out['length'] = str(len(obj))
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except Exception:
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pass
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# Filename where object was defined
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binary_file = False
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fname = find_file(obj)
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if fname is None:
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# if anything goes wrong, we don't want to show source, so it's as
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# if the file was binary
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binary_file = True
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else:
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if fname.endswith(('.so', '.dll', '.pyd')):
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binary_file = True
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elif fname.endswith('<string>'):
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fname = 'Dynamically generated function. No source code available.'
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out['file'] = compress_user(fname)
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# Original source code for a callable, class or property.
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if detail_level:
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# Flush the source cache because inspect can return out-of-date
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# source
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linecache.checkcache()
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try:
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if isinstance(obj, property) or not binary_file:
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src = getsource(obj, oname)
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if src is not None:
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src = src.rstrip()
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out['source'] = src
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except Exception:
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pass
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# Add docstring only if no source is to be shown (avoid repetitions).
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if ds and not self._source_contains_docstring(out.get('source'), ds):
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out['docstring'] = ds
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# Constructor docstring for classes
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if inspect.isclass(obj):
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out['isclass'] = True
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# get the init signature:
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try:
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init_def = self._getdef(obj, oname)
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except AttributeError:
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init_def = None
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# get the __init__ docstring
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try:
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obj_init = obj.__init__
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except AttributeError:
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init_ds = None
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else:
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if init_def is None:
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# Get signature from init if top-level sig failed.
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# Can happen for built-in types (list, etc.).
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try:
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init_def = self._getdef(obj_init, oname)
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except AttributeError:
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pass
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init_ds = getdoc(obj_init)
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# Skip Python's auto-generated docstrings
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if init_ds == _object_init_docstring:
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init_ds = None
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if init_def:
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out['init_definition'] = init_def
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if init_ds:
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out['init_docstring'] = init_ds
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names = [sub.__name__ for sub in type.__subclasses__(obj)]
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if len(names) < 10:
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all_names = ', '.join(names)
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else:
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all_names = ', '.join(names[:10]+['...'])
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out['subclasses'] = all_names
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# and class docstring for instances:
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else:
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# reconstruct the function definition and print it:
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defln = self._getdef(obj, oname)
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if defln:
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out['definition'] = defln
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# First, check whether the instance docstring is identical to the
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# class one, and print it separately if they don't coincide. In
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# most cases they will, but it's nice to print all the info for
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# objects which use instance-customized docstrings.
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if ds:
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try:
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cls = getattr(obj,'__class__')
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except:
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class_ds = None
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else:
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class_ds = getdoc(cls)
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# Skip Python's auto-generated docstrings
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if class_ds in _builtin_type_docstrings:
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class_ds = None
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if class_ds and ds != class_ds:
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out['class_docstring'] = class_ds
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# Next, try to show constructor docstrings
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try:
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init_ds = getdoc(obj.__init__)
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# Skip Python's auto-generated docstrings
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if init_ds == _object_init_docstring:
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init_ds = None
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except AttributeError:
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init_ds = None
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if init_ds:
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out['init_docstring'] = init_ds
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# Call form docstring for callable instances
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if safe_hasattr(obj, '__call__') and not is_simple_callable(obj):
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call_def = self._getdef(obj.__call__, oname)
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if call_def and (call_def != out.get('definition')):
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# it may never be the case that call def and definition differ,
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# but don't include the same signature twice
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out['call_def'] = call_def
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call_ds = getdoc(obj.__call__)
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# Skip Python's auto-generated docstrings
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if call_ds == _func_call_docstring:
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call_ds = None
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if call_ds:
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out['call_docstring'] = call_ds
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return out
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@staticmethod
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def _source_contains_docstring(src, doc):
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"""
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Check whether the source *src* contains the docstring *doc*.
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This is is helper function to skip displaying the docstring if the
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source already contains it, avoiding repetition of information.
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"""
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try:
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(def_node,) = ast.parse(dedent(src)).body
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return ast.get_docstring(def_node) == doc # type: ignore[arg-type]
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except Exception:
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# The source can become invalid or even non-existent (because it
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# is re-fetched from the source file) so the above code fail in
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# arbitrary ways.
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return False
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def psearch(self,pattern,ns_table,ns_search=[],
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ignore_case=False,show_all=False, *, list_types=False):
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"""Search namespaces with wildcards for objects.
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Arguments:
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- pattern: string containing shell-like wildcards to use in namespace
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searches and optionally a type specification to narrow the search to
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objects of that type.
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- ns_table: dict of name->namespaces for search.
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Optional arguments:
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- ns_search: list of namespace names to include in search.
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- ignore_case(False): make the search case-insensitive.
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- show_all(False): show all names, including those starting with
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underscores.
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- list_types(False): list all available object types for object matching.
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"""
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# print('ps pattern:<%r>' % pattern) # dbg
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# defaults
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type_pattern = 'all'
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filter = ''
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# list all object types
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if list_types:
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page.page('\n'.join(sorted(typestr2type)))
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return
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cmds = pattern.split()
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len_cmds = len(cmds)
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if len_cmds == 1:
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# Only filter pattern given
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filter = cmds[0]
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elif len_cmds == 2:
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# Both filter and type specified
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filter,type_pattern = cmds
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else:
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raise ValueError('invalid argument string for psearch: <%s>' %
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pattern)
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# filter search namespaces
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for name in ns_search:
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if name not in ns_table:
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raise ValueError('invalid namespace <%s>. Valid names: %s' %
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(name,ns_table.keys()))
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# print('type_pattern:',type_pattern) # dbg
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search_result, namespaces_seen = set(), set()
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for ns_name in ns_search:
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ns = ns_table[ns_name]
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# Normally, locals and globals are the same, so we just check one.
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if id(ns) in namespaces_seen:
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continue
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namespaces_seen.add(id(ns))
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tmp_res = list_namespace(ns, type_pattern, filter,
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ignore_case=ignore_case, show_all=show_all)
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search_result.update(tmp_res)
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page.page('\n'.join(sorted(search_result)))
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def _render_signature(obj_signature, obj_name) -> str:
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"""
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This was mostly taken from inspect.Signature.__str__.
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Look there for the comments.
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The only change is to add linebreaks when this gets too long.
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"""
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result = []
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pos_only = False
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kw_only = True
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for param in obj_signature.parameters.values():
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if param.kind == inspect.Parameter.POSITIONAL_ONLY:
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pos_only = True
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elif pos_only:
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result.append('/')
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pos_only = False
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if param.kind == inspect.Parameter.VAR_POSITIONAL:
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kw_only = False
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elif param.kind == inspect.Parameter.KEYWORD_ONLY and kw_only:
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result.append('*')
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kw_only = False
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result.append(str(param))
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if pos_only:
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result.append('/')
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# add up name, parameters, braces (2), and commas
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if len(obj_name) + sum(len(r) + 2 for r in result) > 75:
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# This doesn’t fit behind “Signature: ” in an inspect window.
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rendered = '{}(\n{})'.format(obj_name, ''.join(
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' {},\n'.format(r) for r in result)
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)
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else:
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rendered = '{}({})'.format(obj_name, ', '.join(result))
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if obj_signature.return_annotation is not inspect._empty:
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anno = inspect.formatannotation(obj_signature.return_annotation)
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rendered += ' -> {}'.format(anno)
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return rendered
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