def METHOD_NAME(self, pt_session_options=None):
    """Initialize the prompt session and the prompt loop
    and store them in self.pt_app and self.pt_loop.
    Additional keyword arguments for the PromptSession class
    can be specified in pt_session_options.
    """
    if pt_session_options is None:
        pt_session_options = {}
    def get_prompt_tokens():
        return [(Token.Prompt, self.prompt)]
    if self._ptcomp is None:
        compl = IPCompleter(
            shell=self.shell, namespace={}, global_namespace={}, parent=self.shell
        )
        # add a completer for all the do_ methods
        methods_names = [m[3:] for m in dir(self) if m.startswith("do_")]
        def gen_comp(self, text):
            return [m for m in methods_names if m.startswith(text)]
        import types
        newcomp = types.MethodType(gen_comp, compl)
        compl.custom_matchers.insert(0, newcomp)
        # end add completer.
        self._ptcomp = IPythonPTCompleter(compl)
    # setup history only when we start pdb
    if self.shell.debugger_history is None:
        if self.shell.debugger_history_file is not None:
            p = Path(self.shell.debugger_history_file).expanduser()
            if not p.exists():
                p.touch()
            self.debugger_history = FileHistory(os.path.expanduser(str(p)))
        else:
            self.debugger_history = InMemoryHistory()
    else:
        self.debugger_history = self.shell.debugger_history
    options = dict(
        message=(lambda: PygmentsTokens(get_prompt_tokens())),
        editing_mode=getattr(EditingMode, self.shell.editing_mode.upper()),
        key_bindings=create_ipython_shortcuts(self.shell),
        history=self.debugger_history,
        completer=self._ptcomp,
        enable_history_search=True,
        mouse_support=self.shell.mouse_support,
        complete_style=self.shell.pt_complete_style,
        style=getattr(self.shell, "style", None),
        color_depth=self.shell.color_depth,
    )
    if not PTK3:
        options['inputhook'] = self.shell.inputhook
    options.update(pt_session_options)
    if not _use_simple_prompt:
        self.pt_loop = asyncio.new_event_loop()
        self.pt_app = PromptSession(**options)