Pickle 不能pickle 一个namedtuple

Question

我正在尝试namedtuple像这样腌制：

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)

但这由于错误而崩溃：

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)

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

Answer 1

您需要在函数之外定义 namedtuple，并将您的 namedtuple 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)