how to make dill load python2 pickle in python3

Question

If pickled using pickle then following snippet works. but if I have an object dumped using dill, dill.load does not work because dill.load does not accept any encoding argument. is there any way to make this work using dill?

with open(‘py2pickle.p’,'rb') as f
    data = pickle.load(f, encoding='latin1')

Mike McKerns · Accepted Answer · 2019-07-19T12:39:44.700

2

You did dill.dump in python 2, and want do do a dill.load in python 3. There are two issues:

there's no guarantee, regardless of what you are using for serialization that a pickle will work with any version of python other than the one you used (i.e. 3.7 vs 3.6 vs 2.7).
~~as you noted, currently dill doesn't have an encoding argument on load, so you may have to do some conversion before/after you dump/load the object (directly on the object itself).~~

~~Note that I will be adding more of the serialization option arguments to dump and load in the very near future (including the encoding argument).~~

Update: dill now has an encoding argument, as well as other arguments to aid pickle conversion from 2.x to 3.x.

edited Jul 19 '19 at 12:39

answered Jul 03 '19 at 13:23

Mike McKerns

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nope. i did `dill.dump` in python2 and want to load it in python3 – muon Jul 03 '19 at 19:23
I didn’t know you are the dill dev/maintainer. Thanks for the great work!! – muon Jul 05 '19 at 16:28
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I've just added the `encoding` argument and other more recent python 3.x arguments for reading pickles from 2.x. – Mike McKerns Jul 19 '19 at 12:35

how to make dill load python2 pickle in python3

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