Pickle不能pickle命名的元组

Question

我尝试这样处理namedtuple：

def f():
    TemplateData = namedtuple('TemplateData', ['field1', 'field2'])
    f1 = np.random.randn(50,50)
    f2 = np.random.randn(50,50)
    td = TemplateData(f1, f2)
    return td

data = f()
with open("aaaa.pkl", "wb") as fl:
    pkl.dump(data, fl)

但这是由于错误而崩溃：

PicklingError: Can't pickle <class '__main__.TemplateData'>: it's not the same object as __main__.TemplateData

怎么了？如果pickle不是存储命名元组的最佳方式-那么最有效的方式是什么？

Answer 1

您需要在函数外部定义命名元组，并将命名元组的名称更改为TemplateData。

TemplateData = namedtuple('TemplateData', ['field1', 'field2'])
f1 = np.random.randn(50,50)
f2 = np.random.randn(50,50)
model_cluster = TemplateData(f1, f2)

with open("aaaa.pkl", "wb") as fl:
    pkl.dump(model_clusters_dict, fl)