interactiveshell.py 文件源码

def init_prompt_toolkit_cli(self):
        if self.simple_prompt:
            # Fall back to plain non-interactive output for tests.
            # This is very limited, and only accepts a single line.
            def prompt():
                return cast_unicode_py2(input('In [%d]: ' % self.execution_count))
            self.prompt_for_code = prompt
            return

        # Set up keyboard shortcuts
        kbmanager = KeyBindingManager.for_prompt(
            enable_open_in_editor=self.extra_open_editor_shortcuts,
        )
        register_ipython_shortcuts(kbmanager.registry, self)

        # Pre-populate history from IPython's history database
        history = InMemoryHistory()
        last_cell = u""
        for __, ___, cell in self.history_manager.get_tail(self.history_load_length,
                                                        include_latest=True):
            # Ignore blank lines and consecutive duplicates
            cell = cell.rstrip()
            if cell and (cell != last_cell):
                history.append(cell)
                last_cell = cell

        self._style = self._make_style_from_name_or_cls(self.highlighting_style)
        style = DynamicStyle(lambda: self._style)

        editing_mode = getattr(EditingMode, self.editing_mode.upper())

        def patch_stdout(**kwargs):
            return self.pt_cli.patch_stdout_context(**kwargs)

        self._pt_app = create_prompt_application(
                            editing_mode=editing_mode,
                            key_bindings_registry=kbmanager.registry,
                            history=history,
                            completer=IPythonPTCompleter(shell=self,
                                                    patch_stdout=patch_stdout),
                            enable_history_search=True,
                            style=style,
                            mouse_support=self.mouse_support,
                            **self._layout_options()
        )
        self._eventloop = create_eventloop(self.inputhook)
        self.pt_cli = CommandLineInterface(
            self._pt_app, eventloop=self._eventloop,
            output=create_output(true_color=self.true_color))