redirection.py 文件源码

def restore_default_configuration():
    """
    Restores the sys.stdout and the sys.stderr buffer streams to their default
    values without regard to what step has currently overridden their values.
    This is useful during cleanup outside of the running execution block
    """

    def restore(target, default_value):
        if target == default_value:
            return default_value

        if not isinstance(target, RedirectBuffer):
            return target

        try:
            target.active = False
            target.close()
        except Exception:
            pass

        return default_value

    sys.stdout = restore(sys.stdout, sys.__stdout__)
    sys.stderr = restore(sys.stderr, sys.__stderr__)