Inspect continuation prompt signature and pass only viable arguments. (#14274)

Closes  #14273

IPython/terminal/interactiveshell.py

@@ -1,993 +1,1010 b''
 """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 (
     Bool,
     Unicode,
     Dict,
     Integer,
     List,
     observe,
     Instance,
     Type,
     default,
     Enum,
     Union,
     Any,
     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,
     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
-
+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 own testing machinery, and emacs inferior-shell integration through elpy.
 
             This mode default to `True` if the `IPY_TEST_SIMPLE_PROMPT`
             environment variable is set, or the current terminal is not a tty."""
             ).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 commands which are already
         # registered; this is a security precaution.
         known_commands = {
             create_identifier(binding.command): binding.command
             for binding in KEY_BINDINGS
         }
         shortcuts_to_skip = []
         shortcuts_to_add = []
 
         for shortcut in user_shortcuts:
             command_id = shortcut["command"]
             if command_id not in known_commands:
                 allowed_commands = "\n - ".join(known_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 = known_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(
-                    self.prompts.continuation_prompt_tokens(width, lineno=lineno)
+                    _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 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 {"inline", "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()

docs/source/config/details.rst

@@ -1,323 +1,321 b''
 =======================
 Specific config details
 =======================
 
 .. _custom_prompts:
 
 Custom Prompts
 ==============
 
 .. versionchanged:: 5.0
 
 From IPython 5, prompts are produced as a list of Pygments tokens, which are
 tuples of (token_type, text). You can customise prompts by writing a method
 which generates a list of tokens.
 
 There are four kinds of prompt:
 
 * The **in** prompt is shown before the first line of input
   (default like ``In [1]:``).
 * The **continuation** prompt is shown before further lines of input
   (default like ``...:``).
 * The **rewrite** prompt is shown to highlight how special syntax has been
   interpreted (default like ``----->``).
 * The **out** prompt is shown before the result from evaluating the input
   (default like ``Out[1]:``).
 
 Custom prompts are supplied together as a class. If you want to customise only
 some of the prompts, inherit from :class:`IPython.terminal.prompts.Prompts`,
 which defines the defaults. The required interface is like this:
 
 .. class:: MyPrompts(shell)
 
    Prompt style definition. *shell* is a reference to the
    :class:`~.TerminalInteractiveShell` instance.
 
-   .. method:: in_prompt_tokens(cli=None)
-               continuation_prompt_tokens(self, cli=None, width=None)
+   .. method:: in_prompt_tokens()
+               continuation_prompt_tokens(self, width=None)
                rewrite_prompt_tokens()
                out_prompt_tokens()
 
       Return the respective prompts as lists of ``(token_type, text)`` tuples.
 
       For continuation prompts, *width* is an integer representing the width of
       the prompt area in terminal columns.
 
-      *cli*, where used, is the prompt_toolkit ``CommandLineInterface`` instance.
-      This is mainly for compatibility with the API prompt_toolkit expects.
 
 Here is an example Prompt class that will show the current working directory
 in the input prompt:
 
 .. code-block:: python
 
     from IPython.terminal.prompts import Prompts, Token
     import os
 
     class MyPrompt(Prompts):
-         def in_prompt_tokens(self, cli=None):
+         def in_prompt_tokens(self):
              return [(Token, os.getcwd()),
                      (Token.Prompt, ' >>>')]
 
 To set the new prompt, assign it to the ``prompts`` attribute of the IPython
 shell:
 
 .. code-block:: python
 
     In [2]: ip = get_ipython()
        ...: ip.prompts = MyPrompt(ip)
 
     /home/bob >>> # it works
 
 See ``IPython/example/utils/cwd_prompt.py`` for an example of how to write
 extensions to customise prompts.
 
 Inside IPython or in a startup script, you can use a custom prompts class
 by setting ``get_ipython().prompts`` to an *instance* of the class.
 In configuration, ``TerminalInteractiveShell.prompts_class`` may be set to
 either the class object, or a string of its full importable name.
 
 To include invisible terminal control sequences in a prompt, use
 ``Token.ZeroWidthEscape`` as the token type. Tokens with this type are ignored
 when calculating the width.
 
 Colours in the prompt are determined by the token types and the highlighting
 style; see below for more details. The tokens used in the default prompts are
 ``Prompt``, ``PromptNum``, ``OutPrompt`` and ``OutPromptNum``.
 
 .. _termcolour:
 
 Terminal Colors
 ===============
 
 .. versionchanged:: 5.0
 
 There are two main configuration options controlling colours.
 
 ``InteractiveShell.colors`` sets the colour of tracebacks and object info (the
 output from e.g. ``zip?``). It may also affect other things if the option below
 is set to ``'legacy'``. It has four case-insensitive values:
 ``'nocolor', 'neutral', 'linux', 'lightbg'``. The default is *neutral*, which
 should be legible on either dark or light terminal backgrounds. *linux* is
 optimised for dark backgrounds and *lightbg* for light ones.
 
 ``TerminalInteractiveShell.highlighting_style`` determines prompt colours and
 syntax highlighting. It takes the name (as a string) or class (as a subclass of
 ``pygments.style.Style``) of a Pygments style, or the special value ``'legacy'``
 to pick a style in accordance with ``InteractiveShell.colors``.
 
 You can see the Pygments styles available on your system by running::
 
     from pygments.styles import get_all_styles
     list(get_all_styles())
 
 Additionally, ``TerminalInteractiveShell.highlighting_style_overrides`` can override
 specific styles in the highlighting. It should be a dictionary mapping Pygments
 token types to strings defining the style. See `Pygments' documentation
 <http://pygments.org/docs/styles/#creating-own-styles>`__ for the language used
 to define styles.
 
 Colors in the pager
 -------------------
 
 On some systems, the default pager has problems with ANSI colour codes.
 To configure your default pager to allow these:
 
 1. Set the environment PAGER variable to ``less``.
 2. Set the environment LESS variable to ``-r`` (plus any other options
    you always want to pass to less by default). This tells less to
    properly interpret control sequences, which is how color
    information is given to your terminal.
 
 .. _editors:
 
 Editor configuration
 ====================
 
 IPython can integrate with text editors in a number of different ways:
 
 * Editors (such as `(X)Emacs`_, vim_ and TextMate_) can
   send code to IPython for execution.
 
 * IPython's ``%edit`` magic command can open an editor of choice to edit
   a code block.
 
 The %edit command (and its alias %ed) will invoke the editor set in your
 environment as :envvar:`EDITOR`. If this variable is not set, it will default
 to vi under Linux/Unix and to notepad under Windows. You may want to set this
 variable properly and to a lightweight editor which doesn't take too long to
 start (that is, something other than a new instance of Emacs). This way you
 can edit multi-line code quickly and with the power of a real editor right
 inside IPython.
 
 You can also control the editor by setting :attr:`TerminalInteractiveShell.editor`
 in :file:`ipython_config.py`.
 
 Vim
 ---
 
 Paul Ivanov's `vim-ipython <https://github.com/ivanov/vim-ipython>`_ provides
 powerful IPython integration for vim.
 
 .. _emacs:
 
 (X)Emacs
 --------
 
 If you are a dedicated Emacs user, and want to use Emacs when IPython's
 ``%edit`` magic command is called you should set up the Emacs server so that
 new requests are handled by the original process. This means that almost no
 time is spent in handling the request (assuming an Emacs process is already
 running). For this to work, you need to set your EDITOR environment variable
 to 'emacsclient'. The code below, supplied by Francois Pinard, can then be
 used in your :file:`.emacs` file to enable the server:
 
 .. code-block:: common-lisp
 
     (defvar server-buffer-clients)
     (when (and (fboundp 'server-start) (string-equal (getenv "TERM") 'xterm))
       (server-start)
       (defun fp-kill-server-with-buffer-routine ()
         (and server-buffer-clients (server-done)))
       (add-hook 'kill-buffer-hook 'fp-kill-server-with-buffer-routine))
 
 Thanks to the work of Alexander Schmolck and Prabhu Ramachandran,
 currently (X)Emacs and IPython get along very well in other ways.
 
 With (X)EMacs >= 24, You can enable IPython in python-mode with:
 
 .. code-block:: common-lisp
 
     (require 'python)
     (setq python-shell-interpreter "ipython")
 
 .. _`(X)Emacs`: http://www.gnu.org/software/emacs/
 .. _TextMate: http://macromates.com/
 .. _vim: http://www.vim.org/
 
 .. _custom_keyboard_shortcuts:
 
 Keyboard Shortcuts
 ==================
 
 .. versionadded:: 8.11
 
 You can modify, disable or modify keyboard shortcuts for IPython Terminal using
 :std:configtrait:`TerminalInteractiveShell.shortcuts` traitlet.
 
 The list of shortcuts is available in the Configuring IPython :ref:`terminal-shortcuts-list` section.
 
 Advanced configuration
 ----------------------
 
 .. versionchanged:: 5.0
 
 Creating custom commands requires adding custom code to a
 :ref:`startup file <startup_files>`::
 
     from IPython import get_ipython
     from prompt_toolkit.enums import DEFAULT_BUFFER
     from prompt_toolkit.keys import Keys
     from prompt_toolkit.filters import HasFocus, HasSelection, ViInsertMode, EmacsInsertMode
 
     ip = get_ipython()
     insert_mode = ViInsertMode() | EmacsInsertMode()
 
     def insert_unexpected(event):
         buf = event.current_buffer
         buf.insert_text('The Spanish Inquisition')
     # Register the shortcut if IPython is using prompt_toolkit
     if getattr(ip, 'pt_app', None):
         registry = ip.pt_app.key_bindings
         registry.add_binding(Keys.ControlN,
                          filter=(HasFocus(DEFAULT_BUFFER)
                                  & ~HasSelection()
                                  & insert_mode))(insert_unexpected)
 
 
 Here is a second example that bind the key sequence ``j``, ``k`` to switch to
 VI input mode to ``Normal`` when in insert mode::
 
    from IPython import get_ipython
    from prompt_toolkit.enums import DEFAULT_BUFFER
    from prompt_toolkit.filters import HasFocus, ViInsertMode
    from prompt_toolkit.key_binding.vi_state import InputMode
 
    ip = get_ipython()
 
    def switch_to_navigation_mode(event):
       vi_state = event.cli.vi_state
       vi_state.input_mode = InputMode.NAVIGATION
 
    if getattr(ip, 'pt_app', None):
       registry = ip.pt_app.key_bindings
       registry.add_binding(u'j',u'k',
                            filter=(HasFocus(DEFAULT_BUFFER)
                                     & ViInsertMode()))(switch_to_navigation_mode)
 
 For more information on filters and what you can do with the ``event`` object,
 `see the prompt_toolkit docs
 <https://python-prompt-toolkit.readthedocs.io/en/latest/pages/asking_for_input.html#adding-custom-key-bindings>`__.
 
 
 Enter to execute
 ----------------
 
 In the Terminal IPython shell – which by default uses the ``prompt_toolkit``
 interface, the semantic meaning of pressing the :kbd:`Enter` key can be
 ambiguous. In some case :kbd:`Enter` should execute code, and in others it
 should add a new line. IPython uses heuristics to decide whether to execute or
 insert a new line at cursor position. For example, if we detect that the current
 code is not valid Python, then the user is likely editing code and the right
 behavior is to likely to insert a new line. If the current code is a simple
 statement like `ord('*')`, then the right behavior is likely to execute. Though
 the exact desired semantics often varies from users to users.
 
 As the exact behavior of :kbd:`Enter` is ambiguous, it has been special cased
 to allow users to completely configure the behavior they like. Hence you can
 have enter always execute code. If you prefer fancier behavior, you need to get
 your hands dirty and read the ``prompt_toolkit`` and IPython documentation
 though. See :ghpull:`10500`, set the
 ``c.TerminalInteractiveShell.handle_return`` option and get inspiration from the
 following example that only auto-executes the input if it begins with a bang or
 a modulo character (``!`` or ``%``). To use the following code, add it to your
 IPython configuration::
 
     def custom_return(shell):
 
         """This function is required by the API. It takes a reference to
         the shell, which is the same thing `get_ipython()` evaluates to.
         This function must return a function that handles each keypress
         event. That function, named `handle` here, references `shell`
         by closure."""
 
         def handle(event):
 
             """This function is called each time `Enter` is pressed,
             and takes a reference to a Prompt Toolkit event object.
             If the current input starts with a bang or modulo, then
             the input is executed, otherwise a newline is entered,
             followed by any spaces needed to auto-indent."""
 
             # set up a few handy references to nested items...
 
             buffer = event.current_buffer
             document = buffer.document
             text = document.text
 
             if text.startswith('!') or text.startswith('%'): # execute the input...
 
                 buffer.accept_action.validate_and_handle(event.cli, buffer)
 
             else: # insert a newline with auto-indentation...
 
                 if document.line_count > 1: text = text[:document.cursor_position]
                 indent = shell.check_complete(text)[1]
                 buffer.insert_text('\n' + indent)
             
                 # if you just wanted a plain newline without any indentation, you
                 # could use `buffer.insert_text('\n')` instead of the lines above
 
         return handle
 
     c.TerminalInteractiveShell.handle_return = custom_return

examples/Embedding/embed_class_long.py

@@ -1,145 +1,145 b''
 #!/usr/bin/env python
 """An example of how to embed an IPython shell into a running program.
 
 Please see the documentation in the IPython.Shell module for more details.
 
 The accompanying file embed_class_short.py has quick code fragments for
 embedding which you can cut and paste in your code once you understand how
 things work.
 
 The code in this file is deliberately extra-verbose, meant for learning."""
 
 # The basics to get you going:
 
 # IPython injects get_ipython into builtins, so you can know if you have nested
 # copies running.
 
 # Try running this code both at the command line and from inside IPython (with
 # %run example-embed.py)
 
 from IPython.terminal.prompts import Prompts, Token
+from traitlets.config.loader import Config
 
 class CustomPrompt(Prompts):
 
-    def in_prompt_tokens(self, cli=None):
+    def in_prompt_tokens(self):
 
        return [
             (Token.Prompt, 'In <'),
             (Token.PromptNum, str(self.shell.execution_count)),
             (Token.Prompt, '>: '),
             ]
 
     def out_prompt_tokens(self):
        return [
             (Token.OutPrompt, 'Out<'),
             (Token.OutPromptNum, str(self.shell.execution_count)),
             (Token.OutPrompt, '>: '),
         ]
  
 
-from traitlets.config.loader import Config
 try:
     get_ipython
 except NameError:
     nested = 0
     cfg = Config()
     cfg.TerminalInteractiveShell.prompts_class=CustomPrompt
 else:
     print("Running nested copies of IPython.")
     print("The prompts for the nested copy have been modified")
     cfg = Config()
     nested = 1
 
 # First import the embeddable shell class
 from IPython.terminal.embed import InteractiveShellEmbed
 
 # Now create an instance of the embeddable shell. The first argument is a
 # string with options exactly as you would type them if you were starting
 # IPython at the system command line. Any parameters you want to define for
 # configuration can thus be specified here.
 ipshell = InteractiveShellEmbed(config=cfg,
                        banner1 = 'Dropping into IPython',
                        exit_msg = 'Leaving Interpreter, back to program.')
 
 # Make a second instance, you can have as many as you want.
 ipshell2 = InteractiveShellEmbed(config=cfg,
                         banner1 = 'Second IPython instance.')
 
 print('\nHello. This is printed from the main controller program.\n')
 
 # You can then call ipshell() anywhere you need it (with an optional
 # message):
 ipshell('***Called from top level. '
         'Hit Ctrl-D to exit interpreter and continue program.\n'
         'Note that if you use %kill_embedded, you can fully deactivate\n'
         'This embedded instance so it will never turn on again')
 
 print('\nBack in caller program, moving along...\n')
 
 #---------------------------------------------------------------------------
 # More details:
 
 # InteractiveShellEmbed instances don't print the standard system banner and
 # messages. The IPython banner (which actually may contain initialization
 # messages) is available as get_ipython().banner in case you want it.
 
 # InteractiveShellEmbed instances print the following information every time they
 # start:
 
 # - A global startup banner.
 
 # - A call-specific header string, which you can use to indicate where in the
 # execution flow the shell is starting.
 
 # They also print an exit message every time they exit.
 
 # Both the startup banner and the exit message default to None, and can be set
 # either at the instance constructor or at any other time with the
 # by setting the banner and exit_msg attributes.
 
 # The shell instance can be also put in 'dummy' mode globally or on a per-call
 # basis. This gives you fine control for debugging without having to change
 # code all over the place.
 
 # The code below illustrates all this.
 
 
 # This is how the global banner and exit_msg can be reset at any point
 ipshell.banner2 = 'Entering interpreter - New Banner'
 ipshell.exit_msg = 'Leaving interpreter - New exit_msg'
 
 def foo(m):
     s = 'spam'
     ipshell('***In foo(). Try %whos, or print s or m:')
     print('foo says m = ',m)
 
 def bar(n):
     s = 'eggs'
     ipshell('***In bar(). Try %whos, or print s or n:')
     print('bar says n = ',n)
     
 # Some calls to the above functions which will trigger IPython:
 print('Main program calling foo("eggs")\n')
 foo('eggs')
 
 # The shell can be put in 'dummy' mode where calls to it silently return. This
 # allows you, for example, to globally turn off debugging for a program with a
 # single call.
 ipshell.dummy_mode = True
 print('\nTrying to call IPython which is now "dummy":')
 ipshell()
 print('Nothing happened...')
 # The global 'dummy' mode can still be overridden for a single call
 print('\nOverriding dummy mode manually:')
 ipshell(dummy=False)
 
 # Reactivate the IPython shell
 ipshell.dummy_mode = False
 
 print('You can even have multiple embedded instances:')
 ipshell2()
 
 print('\nMain program calling bar("spam")\n')
 bar('spam')
 
 print('Main program finished. Bye!')

examples/utils/cwd_prompt.py

@@ -1,26 +1,22 b''
 """This is an example that shows how to create new prompts for IPython
 """
 
 from IPython.terminal.prompts import Prompts, Token
 import os
 
 class MyPrompt(Prompts):
 
-     def in_prompt_tokens(self, cli=None):
-         return [(Token, os.getcwd()),
-                 (Token.Prompt, '>>>')]
+    def in_prompt_tokens(self):
+        return [(Token, os.getcwd()), (Token.Prompt, ">>>")]
+
 
 def load_ipython_extension(shell):
     new_prompts = MyPrompt(shell)
     new_prompts.old_prompts = shell.prompts
     shell.prompts = new_prompts
 
 def unload_ipython_extension(shell):
     if not hasattr(shell.prompts, 'old_prompts'):
         print("cannot unload")
     else:
         shell.prompts = shell.prompts.old_prompts
-
-
-
-