pip升级pip3不可用的问题

pip升级之后pip3不可用

:~$ pip3
Traceback (most recent call last):
  File "/home/feifei/.local/bin/pip3", line 7, in 
    from pip._internal import main
  File "/home/feifei/.local/lib/python3.5/site-packages/pip/_internal/__init__.py", line 40, in 
    from pip._internal.cli.autocompletion import autocomplete
  File "/home/feifei/.local/lib/python3.5/site-packages/pip/_internal/cli/autocompletion.py", line 8, in 
    from pip._internal.cli.main_parser import create_main_parser
  File "/home/feifei/.local/lib/python3.5/site-packages/pip/_internal/cli/main_parser.py", line 12, in 
    from pip._internal.commands import (
  File "/home/feifei/.local/lib/python3.5/site-packages/pip/_internal/commands/__init__.py", line 6, in 
    from pip._internal.commands.completion import CompletionCommand
  File "/home/feifei/.local/lib/python3.5/site-packages/pip/_internal/commands/completion.py", line 6, in 
    from pip._internal.cli.base_command import Command
  File "/home/feifei/.local/lib/python3.5/site-packages/pip/_internal/cli/base_command.py", line 19, in 
    from pip._internal.download import PipSession
  File "/home/feifei/.local/lib/python3.5/site-packages/pip/_internal/download.py", line 15, in 
    from pip._vendor import requests, six, urllib3
  File "/home/feifei/.local/lib/python3.5/site-packages/pip/_vendor/requests/__init__.py", line 97, in 
    from pip._vendor.urllib3.contrib import pyopenssl
  File "/home/feifei/.local/lib/python3.5/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.py", line 46, in 
    import OpenSSL.SSL
  File "/usr/local/lib/python3.5/dist-packages/OpenSSL/__init__.py", line 8, in 
    from OpenSSL import crypto, SSL
  File "/usr/local/lib/python3.5/dist-packages/OpenSSL/SSL.py", line 194, in 
    if _lib.Cryptography_HAS_SSL_ST:
AttributeError: module 'lib' has no attribute 'Cryptography_HAS_SSL_ST'

#　解决方法：　
删除 openssl 库并重新安装

:~$ sudo rm -rf /usr/local/lib/python3.5/dist-packages/OpenSSL/
:~$ sudo apt install --reinstall python-openssl