python 报错 pip安装三方库不成功:WARNING: You are using pip version 20.2.3; however, version 20.2.4 is available

本来是想下载requests模块，结果安装时pip报错，解决报错问题之后，顺便安装requests模块，验证问题是否成功解决

1.解决pip安装三方库不成功

pip安装三方库不成功:WARNING: You are using pip version 20.2.3; however, version 20.2.4 is available.

You should consider upgrading via the ‘c:\users\lenovo\appdata\local\programs\python\python37\python.exe -m pip install --upgrade pip’ command.

原因：pip版本过低导致安装第三方库失败

解决方法：

在cmd中输入： easy_install -U pip

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