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Thanks. I tried that fix already and in my case it didn't help.
But I got it working with this fix, I think I have read that it is @Furion's steem-python library:

pip install -U git+git://github.com/Netherdrake/steem-python

I think renaming the 0.9.3 egg file to 0.9.3.1 may work, but the inofficial library is a new solution. Thanks.