Pickle 不能pickle 一个namedtuple [英] Pickle can't pickle a namedtuple

问题描述

我正在尝试像这样腌制 namedtuple:

I am trying to pickle the namedtuple like this:

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 - 最有效的方式是什么?

What's wrong? If pickle is not the best way to store named tuple - what is the most efficient way?

推荐答案

你需要在你的函数之外定义namedtuple，并将namedtuple的名字改成TemplateData.

You need to define the namedtuple outside of your function, and change the name of your namedtuple to 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)

这篇关于Pickle 不能pickle 一个namedtuple的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！