Comments (6)
How did you get your Python? System, brew, python.org? Also, what pip version. If < 8.1 try upgrading and then uninstall and reinstall cffi
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pip version 8.1.1
I think the 2.7.11 Python I am using was built from source and is managed via pyenv
Python 2.7.11 (default, Mar 7 2016, 16:47:50)
[GCC 4.2.1 Compatible Apple LLVM 7.0.2 (clang-700.1.81)] on darwin
Someone from cffi
commented this :
CFFI is not correctly installed: the version that it is trying to import was compiled with a different Python than the current one. That's a typical error message for UCS2 versus UCS4 Python versions.
And I was also pointed to pyenv Issue #257 and that it may have something to do with how I built the Python I am using.
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Turns out that it was a "UCS2 versus UCS4 Python versions" problem. Running these commands got my project to build:
$pyenv uninstall 2.7.11
$PYTHON_CONFIGURE_OPTS="--enable-unicode=ucs2" pyenv install 2.7.11
and then reinstalling pip
, virtualenv
, and pyenv rehash
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Is it worth creating a PR to add some documentation or FAQ/troubleshooting regarding this issue? CFFI did add this to their installation README - http://cffi.readthedocs.io/en/latest/installation.html#linux-and-os-x-ucs2-versus-ucs4
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@carrchr Thanks for the information. I'm going to be modifying the build systems to produce both ucs2 and ucs4 wheels for cffi so that users will be able to pull the correct one. Unfortunately users on out of date pip will still pull the wrong one (as pip prior to 8 is unaware of the proper tag), but we can add some information to explain that upgrading to pip8+ will fix the issue.
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A UCS4 wheel is now available so this issue should be resolved for future users on pip8+
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