unsupported pickle protocol

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我是靠谱客的博主心灵美大雁，最近开发中收集的这篇文章主要介绍unsupported pickle protocol，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

我的程序大概就是利用shelve建立一个小型的数据库。我使用python3X很不习惯，于是换回到了python2.7，可是出现了unsupported pickle protocol问题。代码已经修改过。很是郁闷。于是上网查阅pickle protocol是什么协议。原来这是一种将数据转换成二进制流的文本协议。也就是说我在python2.7和python使用的pickle协议版本不同操作数据库。所以出现了冲突。如果要了解pickle更多请点击此处

down vote

Pickle uses different protocols to convert your data to a binary stream.

In python 2 there are 3 different protocols (0, 1, 2) and the default is 0.
In python 3 there are 5 different protocols (0, 1, 2, 3, 4) and the default is 3

如果要解决这个问题，那该怎么办？要么弃用2.7用3.0以上的版本。或者在python中通过改变

pickle.dump(your_object, your_file, protocol)中的protocol参数成一致即可。

29 down vote

Pickle uses different protocols to convert your data to a binary stream.

In python 2 there are 3 different protocols (0, 1, 2) and the default is 0.
In python 3 there are 5 different protocols (0, 1, 2, 3, 4) and the default is 3.