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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def interactive(plugin):
    '''A run mode for the CLI that runs the plugin in a loop based on user
    input.
    '''
    items = [item for item in once(plugin) if not item.get_played()]
    parent_stack = []  # Keep track of parents so we can have a '..' option

    selected_item = get_user_choice(items)
    while selected_item is not None:
        if parent_stack and selected_item == parent_stack[-1]:
            # User selected the parent item, remove from list
            parent_stack.pop()
        else:
            # User selected non parent item, add current url to parent stack
            parent_stack.append(ListItem.from_dict(label='..',
                                                   path=plugin.request.url))
        patch_plugin(plugin, selected_item.get_path())

        items = [item for item in once(plugin, parent_stack=parent_stack)
                 if not item.get_played()]
        selected_item = get_user_choice(items)