Pip disabled after trying to upgrade Openssl

Question

I've been trying to use tweepy which requieres pyOpenssl, but after trying to upgrade Openssl I'm getting this error which actually disable my pip for any package

$ pip install 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/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 565, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2598, in load_entry_point
    return ep.load()
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2258, in load
    return self.resolve()
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2264, 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 68, in <module>
    _attach_namespace(urllib3, 'requests.packages')
  File "/usr/lib/python2.7/dist-packages/requests/__init__.py", line 63, in _attach_namespace
    module = __import__(name)
  File "/usr/lib/python2.7/dist-packages/urllib3/contrib/pyopenssl.py", line 55, in <module>
    import OpenSSL.SSL
  File "/usr/local/lib/python2.7/dist-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import rand, crypto, SSL
  File "/usr/local/lib/python2.7/dist-packages/OpenSSL/SSL.py", line 112, in <module>
    if _lib.Cryptography_HAS_SSL_ST:
AttributeError: 'FFILibrary' object has no attribute 'Cryptography_HAS_SSL_ST'

Now, as I said, I can't install anything since this error keeps apearing. I already tried to follow the recomendation on the following link but without any success

How to install cryptography on ubuntu?

The version of python is 2.7 and linux is debian

Thanks