Python问题 ： AttributeError: 'module' object has no attribute 'SSL_ST_INIT' 解决办法

pip安装paramiko包的时候未报错，但执行pip list | grep paramiko时候报错如下：

$ pip list | grep paramiko
Traceback (most recent call last):
  File "/usr/local/bin/pip", line 7, in 
    from pip._internal import main
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/__init__.py", line 40, in 
    from pip._internal.cli.autocompletion import autocomplete
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/autocompletion.py", line 8, in 
    from pip._internal.cli.main_parser import create_main_parser
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/main_parser.py", line 12, in 
    from pip._internal.commands import (
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/commands/__init__.py", line 6, in 
    from pip._internal.commands.completion import CompletionCommand
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/commands/completion.py", line 6, in 
    from pip._internal.cli.base_command import Command
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/cli/base_command.py", line 18, in 
    from pip._internal.download import PipSession
  File "/usr/local/lib/python2.7/dist-packages/pip/_internal/download.py", line 15, in 
    from pip._vendor import requests, six, urllib3
  File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/__init__.py", line 97, in 
    from pip._vendor.urllib3.contrib import pyopenssl
  File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/urllib3/contrib/pyopenssl.py", line 46, in 
    import OpenSSL.SSL
  File "/usr/lib/python2.7/dist-packages/OpenSSL/__init__.py", line 8, in 
    from OpenSSL import rand, crypto, SSL
  File "/usr/lib/python2.7/dist-packages/OpenSSL/SSL.py", line 105, in 
    SSL_ST_INIT = _lib.SSL_ST_INIT
AttributeError: 'module' object has no attribute 'SSL_ST_INIT'

问题解决方法：

　　rm -rf /usr/lib/python2.7/dist-packages/OpenSSL
　　rm -rf /usr/lib/python2.7/dist-packages/pyOpenSSL-0.15.1.egg-info
　　sudo pip install pyopenssl

执行正常：
$ pip list | grep paramiko
paramiko 2.4.2