以下代碼使用上下文管理器將變量存儲和加載到文件中。但是，必須設(shè)置value上下文管理器 ( loaded.value)所產(chǎn)生內(nèi)容的屬性非常煩人。我想要不必像這樣定義一個新類 LoadedValue將上下文管理器 ( loaded) 的生成值設(shè)置為保存的值。解決這些問題中的任何一個將不勝感激。import osimport picklefrom contextlib import contextmanagerclass LoadedValue:    def __init__(self, value):        self.value = value    def __str__(self):        return "<LoadedValue: {}>".format(self.value)@contextmanagerdef load_manager(load_file="file.pkl"):    with open(load_file, "rb") as f:        loaded_object = LoadedValue(pickle.load(f))    try:        yield loaded_object    finally:        with open(load_file, "wb+") as f:            pickle.dump(loaded_object.value, f)if __name__ == "__main__":    filename = "test.pkl"    with open(filename, "wb+") as f:        pickle.dump(7, f)    with load_manager(filename) as loaded:        print(loaded) # >>> <LoadedValue: 7>        loaded.value = 5 # this is what I have to do        # loaded = 5  # this is what I want to do    with load_manager(filename) as loaded:        print(loaded) # >>> <LoadedValue: 5>注意：這最初是在 CodeReview 上發(fā)布的，但我決定在此處重新發(fā)布以獲取答案，并將其留在 CodeReview 上以幫助以其他方式改進代碼。