ValueError:不支持的泡菜协议:3，python2泡菜无法加载python 3泡菜转储的文件? [英] ValueError: unsupported pickle protocol: 3, python2 pickle can not load the file dumped by python 3 pickle?

问题描述

我使用pickle在python 3上转储文件，并使用pickle在python 2上加载文件，出现ValueError.

I use pickle to dump a file on python 3, and I use pickle to load the file on python 2, the ValueError appears.

那么，python 2 pickle无法加载python 3 pickle转储的文件吗?

So, python 2 pickle can not load the file dumped by python 3 pickle?

是否要?怎么办?

推荐答案

您应该在Python 3中以较低的协议编号编写腌制的数据.Python3引入了编号为3的新协议(并将其用作默认协议) )，因此请切换回2的值，该值可以由Python 2读取.

You should write the pickled data with a lower protocol number in Python 3. Python 3 introduced a new protocol with the number 3 (and uses it as default), so switch back to a value of 2 which can be read by Python 2.

在 pickle.dump 中检查protocol参数.您生成的代码将如下所示.

Check the protocolparameter in pickle.dump. Your resulting code will look like this.

pickle.dump(your_object, your_file, protocol=2)

pickle.load 中没有protocol参数，因为pickle可以从文件中确定协议.

There is no protocolparameter in pickle.load because pickle can determine the protocol from the file.

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