You are using pip version 9.0.1, however version 18.0 is available. You should consider upgrading via the 'pip install --upgrade pip' command.

You are using pip version 9.0.1, however version 18.0 is available. You should consider upgrading via the 'pip install --upgrade pip' command.

实测使用pip3进行一些软件安装的时候，会弹出这个，记住不要理会，一旦你执行，就会升级pip，并冲突pip3造成pip3不能用，这时候就要重新安装一下python3
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原文地址：https://www.cnblogs.com/polar-lights/p/9357622.html