python - Pip Error : 'module' object has no attribute 'Cryptography_HAS_SSL_ST'

Question

I tried to install from pip and keep on getting similar type of errors.

$ pip install quandl
Traceback (most recent call last):
  File "/usr/bin/pip", line 9, in <module>
    load_entry_point('pip==1.5.6', 'console_scripts', 'pip')()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 558, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2682, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2355, in load
    return self.resolve()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2361, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python2.7/dist-packages/pip/__init__.py", line 74, in <module>
    from pip.vcs import git, mercurial, subversion, bazaar  # noqa
  File "/usr/lib/python2.7/dist-packages/pip/vcs/mercurial.py", line 9, in <module>
    from pip.download import path_to_url
  File "/usr/lib/python2.7/dist-packages/pip/download.py", line 22, in <module>
    import requests, six
  File "/usr/lib/python2.7/dist-packages/requests/__init__.py", line 53, in <module>
    from .packages.urllib3.contrib import pyopenssl
  File "/usr/lib/python2.7/dist-packages/urllib3/contrib/pyopenssl.py", line 53, in <module>
    import OpenSSL.SSL
  File "/home/ubuntu/.local/lib/python2.7/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import rand, crypto, SSL
  File "/home/ubuntu/.local/lib/python2.7/site-packages/OpenSSL/SSL.py", line 112, in <module>
    if _lib.Cryptography_HAS_SSL_ST:
AttributeError: 'module' object has no attribute 'Cryptography_HAS_SSL_ST'

Now even though i tried to install different pip modules iam getting same error.Is there any solution for this ? This was caused due to the unexpected killing of the process while a pip module is being downloaded.

Please help me with the necessary steps to rectify this error.

I tried to install this

$ pip install -U cryptography
Traceback (most recent call last):
  File "/usr/bin/pip", line 9, in <module>
    load_entry_point('pip==1.5.6', 'console_scripts', 'pip')()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 558, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2682, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2355, in load
    return self.resolve()
  File "/usr/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2361, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/lib/python2.7/dist-packages/pip/__init__.py", line 74, in <module>
    from pip.vcs import git, mercurial, subversion, bazaar  # noqa
  File "/usr/lib/python2.7/dist-packages/pip/vcs/mercurial.py", line 9, in <module>
    from pip.download import path_to_url
  File "/usr/lib/python2.7/dist-packages/pip/download.py", line 22, in <module>
    import requests, six
  File "/usr/lib/python2.7/dist-packages/requests/__init__.py", line 53, in <module>
    from .packages.urllib3.contrib import pyopenssl
  File "/usr/lib/python2.7/dist-packages/urllib3/contrib/pyopenssl.py", line 53, in <module>
    import OpenSSL.SSL
  File "/home/ubuntu/.local/lib/python2.7/site-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import rand, crypto, SSL
  File "/home/ubuntu/.local/lib/python2.7/site-packages/OpenSSL/SSL.py", line 112, in <module>
    if _lib.Cryptography_HAS_SSL_ST:
AttributeError: 'module' object has no attribute 'Cryptography_HAS_SSL_ST'

Answer 1

Ubuntu 16.04.3 here:

I think I have fixed this by removing the python-openssl package (and it's dependencies) with:

apt-get --auto-remove remove python-openssl

Then installing the latest version with pip:

pip install pyOpenSSL

Of course, if you install another apt package that depends on it, it'll pull it back in. I hope if you use pip for everything you can from now on instead of apt, it should be fine.

Edit: as of January 2019 this issue doesn't seem to exist any more.