Ubuntu|ython3 :ImportError: cannot import name 'main'

1、问题

root@stephen-K55VD:/usr/bin# pip3
Traceback (most recent call last):
  File "/usr/bin/pip3", line 9, in <module>
    from pip import main
ImportError: cannot import name 'main'

2、解决办法

编辑/usr/bin/pip3，修改代码

from pip._internal import main