Method _reset_py_display

cmd2/cmd2.py:4801–4820

Reset the dynamic objects in the sys module that the py and ipy consoles fight over. When a Python console starts it adopts certain display settings if they've already been set. If an ipy console has previously been run, then py uses its settings and ends up looking like an

()

    @staticmethod
    def _reset_py_display() -> None:
        """Reset the dynamic objects in the sys module that the py and ipy consoles fight over.

        When a Python console starts it adopts certain display settings if they've already been set.
        If an ipy console has previously been run, then py uses its settings and ends up looking
        like an ipy console in terms of prompt and exception text. This method forces the Python
        console to create its own display settings since they won't exist.

        IPython does not have this problem since it always overwrites the display settings when it
        is run. Therefore, this method only needs to be called before creating a Python console.
        """
        # Delete any prompts that have been set
        attributes = ["ps1", "ps2", "ps3"]
        for cur_attr in attributes:
            with contextlib.suppress(KeyError):
                del sys.__dict__[cur_attr]

        # Reset functions
        sys.displayhook = sys.__displayhook__
        sys.excepthook = sys.__excepthook__

    def _set_up_py_shell_env(self, interp: InteractiveConsole) -> _SavedCmd2Env:
        """Set up interactive Python shell environment.