python3中的_pickle不适用于大数据保存 [英] _pickle in python3 doesn't work for large data saving

问题描述

我正在尝试应用_pickle将数据保存到磁盘上.但是调用_pickle.dump时出现错误

I am trying to apply _pickle to save data onto disk. But when calling _pickle.dump, I got an error

OverflowError: cannot serialize a bytes object larger than 4 GiB

使用_pickle难吗? (对于python2为cPickle)

Is this a hard limitation to use _pickle? (cPickle for python2)

推荐答案

在具有PEP 3154和Pickle 4.0的Python 3.4中不再可用
https://www.python.org/dev/peps/pep-3154/

Not anymore in Python 3.4 which has PEP 3154 and Pickle 4.0
https://www.python.org/dev/peps/pep-3154/

但是您需要说要使用该协议的版本4:
https://docs.python.org/3/library/pickle.html

But you need to say you want to use version 4 of the protocol:
https://docs.python.org/3/library/pickle.html

pickle.dump(d, open("file", 'w'), protocol=4)

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