CODEWITHSUNDEEP
pythonpandaspickle
Henrique Nader
Henrique Nader

Reputation: 279

In Pandas, how read a Pickle file that throws Unpickling Error: invalid load key?

I'm reading a pickle file with:

pandas.read_pickle('data/file.pickle')

and it throws this error:

UnpicklingError: invalid load key, '\x00'.

Note that I've seen other threads on how to solve this problem when saving the pickle file, but in my case I just need to open this specific dataframe.

Also the pickle file could contain some special characters.

Upvotes: 9

Views: 9745

Answers (1)

heavelock
heavelock

Reputation: 364

One of the possible explanation is pickling with compression. On my system, reading files compressed with either xz or gzip throws exception of invalid load key if I do not specify compression. In similar case, both zip and bz2 raise different exceptions.

I recommend to try one of those:

pandas.read_pickle('data/file.pickle', 'xz')
pandas.read_pickle('data/file.pickle', 'gzip')

Upvotes: 7

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