Same error after upgrade from Ubuntu 15.04 to 16.04.
Solved it manually removing cryptography and re-installing with:
# sudo rmv -R /usr/lib/python2.7/dist-packages/cryptography
# pip install cryptography
The error:
paulo@paulo-Aspire-5742 ~> pip
Traceback (most recent call last):
File "/usr/bin/pip", line 9, in <module>
from pip import main
File "/usr/lib/python2.7/dist-packages/pip/__init__.py", line 13, in <module>
from pip.exceptions import InstallationError, CommandError, PipError
File "/usr/lib/python2.7/dist-packages/pip/exceptions.py", line 6, in <module>
from pip._vendor.six import iteritems
File "/usr/lib/python2.7/dist-packages/pip/_vendor/__init__.py", line 64, in
<module>
vendored("cachecontrol")
File "/usr/lib/python2.7/dist-packages/pip/_vendor/__init__.py", line 36, in
vendored
__import__(modulename, globals(), locals(), level=0)
File
"/usr/share/python-wheels/CacheControl-0.11.5-py2.py3-none-any.whl/cachecontrol/__init__.py",
line 9, in <module>
File
"/usr/share/python-wheels/CacheControl-0.11.5-py2.py3-none-any.whl/cachecontrol/wrapper.py",
line 1, in <module>
File
"/usr/share/python-wheels/CacheControl-0.11.5-py2.py3-none-any.whl/cachecontrol/adapter.py",
line 3, in <module>
File
"/usr/share/python-wheels/requests-2.9.1-py2.py3-none-any.whl/requests/__init__.py",
line 53, in <module>
File
"/usr/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/contrib/pyopenssl.py",
line 54, in <module>
File "/usr/lib/python2.7/dist-packages/OpenSSL/__init__.py", line 8, in
<module>
from OpenSSL import rand, crypto, SSL
File "/usr/lib/python2.7/dist-packages/OpenSSL/rand.py", line 11, in <module>
from OpenSSL._util import (
File "/usr/lib/python2.7/dist-packages/OpenSSL/_util.py", line 6, in <module>
from cryptography.hazmat.bindings.openssl.binding import Binding
File
"/usr/lib/python2.7/dist-packages/cryptography/hazmat/bindings/openssl/binding.py",
line 68, in <module>
error=-1)
File
"/usr/lib/python2.7/dist-packages/cryptography/hazmat/bindings/openssl/binding.py",
line 57, in wrapper
ffi.def_extern(name=name, **kwargs)(func)
AttributeError: 'CompiledFFI' object has no attribute 'def_extern'
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https://bugs.launchpad.net/bugs/1555723
Title:
pip is breaking in ppc64el
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