[Bug 1733311] Re: pip crashes at startup importing from OpenSSL

[Koen Smets]

I discovered the root cause of the issue by comparing the output of `pip
freeze` on both servers.

Apparently on the upgraded server cryptography-1.9 was installed in
`/usr/local/python2.7/dist-packages`, while overriding python-
cryptography package.

Running `sudo pip uninstall cryptography` resolves the issue.

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https://bugs.launchpad.net/bugs/1733311

Title:
  pip crashes at startup importing from OpenSSL

Status in pyopenssl package in Ubuntu:
  Confirmed

Bug description:
  For python-openssl Version: 0.15.1-2build1 on Ubuntu 16.04

  'pip' (and other commands) importing from OpenSSL crash with the
  following traceback

  $ 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/SSL.py", line 118, in <module>
      SSL_ST_INIT = _lib.SSL_ST_INIT
  AttributeError: 'module' object has no attribute 'SSL_ST_INIT'

  By googling the last line, it seems many people are experiencing this
  problem (an example https://stackoverflow.com/questions/43267157
  /python-attributeerror-module-object-has-no-attribute-ssl-st-init).

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