出现一片红，中间夹杂着一片黄，提示如下：

DEPRECATION: Could not build wheels for fairseq which do not use PEP

517. pip will fall back to legacy ‘setup.py install’ for these. pip 21.0 will remove support for this functionality. A possible replacement is to fix the wheel build issue reported above. You can
     find discussion regarding this at
     https://github.com/pypa/pip/issues/8368.

差不多就是这样子的错误：
错误长这样

被黄字误导所以以为是pip的问题，把pip降级之后并没有解决．
最后解决方式：

我是3.6的版本咯，那你自己的是什么你就写什么哟～

apt-get install python3.6-dev

问题解决！