相关疑难解决方法(0)

$ sudo pip install --upgrade pyOpenSSL

Traceback (most recent call last):
  File "/usr/local/bin/pip", line 9, in <module>
load_entry_point('pip==8.1.1', '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/local/lib/python2.7/dist-packages/pip-8.1.1-
 py2.7.egg/pip/__init__.py", line 16, in <module>
from pip.vcs import git, mercurial, subversion, bazaar  # noqa
 File "/usr/local/lib/python2.7/dist-packages/pip-8.1.1-
 py2.7.egg/pip/vcs/mercurial.py", line 9, in <module>
from …