__init__.py 文件源码

def _run_interactive_shell():
    """Run an interactive shell as if it were the first thing being
    run.
    """
    builtins = __builtins__
    code_ = code

    import __main__
    __main__.__dict__.clear()
    __main__.__dict__.update(dict(
        __name__     = "__main__",

        # normal interactive shell leaves this undefined
        # __file__     = None,

        __builtins__ = builtins
    ))

    code_.interact()