ubuntu16.04 pip3 升级后报错！！！请求各位大佬帮助！

root@ubuntu:/home/z18n# pip3 install easydict
Traceback (most recent call last):
  File "/usr/local/bin/pip3", line 13, in <module>
    from pip import __main__  
  File "/usr/local/lib/python3.5/dist-packages/pip/__main__.py", line 21, in <module>
    from pip._internal.cli.main import main as _main
  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/main.py", line 60
    sys.stderr.write(f"ERROR: {exc}")
                                   ^
SyntaxError: invalid syntax

Traceback (most recent call last):
  File "/usr/local/bin/pip3", line 7, in <module>
    from pip._internal.cli.main import main
  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/main.py", line 60
    sys.stderr.write(f"ERROR: {exc}")
                                   ^
SyntaxError: invalid syntax

一开始是这样的

后面根据网上的回复

1 from pip import __main__
2 if __name__ == '__main__':
3     sys.exit(__main__._main())

就报上面的错误了

缩进错误，你是不是tab和4个空格混用了？

你的问题解决了吗

这个问题卡很久了，怎么解决哇

请问解决了吗！！！！！