pip install - locale.Error: unsupported locale setting

使用pip安装依赖包时，出现：

Traceback (most recent call last):
  File "/usr/bin/pip3", line 11, in <module>
    sys.exit(main())
  File "/usr/lib/python3/dist-packages/pip/__init__.py", line 215, in main
    locale.setlocale(locale.LC_ALL, '')
  File "/usr/lib/python3.5/locale.py", line 594, in setlocale
    return _setlocale(category, locale)

locale.Error: unsupported locale setting

解决办法：

在 Linux 终端输入以下命令，即可

export LC_ALL=C