openpyxl模块安装时报错： You are using pip version 19.2.3, however version 20.0.2 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command.

定义：openpyxl模块是一个读写Excel文件(.xlsx)的Python库， 能够同时读取和修改Excel文件

doc下安装第三方模块：在doc下输入pip install openpyxl  或者pip3 install openpyxl 都报一下错误

PS：因为我安装了2个版本的Python

 输入更新命令：pip -m pip install -upgrade pip 更新

或者是 python -m pip install -U pip

更新成功

 再次输入pip3 install openpyxl

验证是否安装成功：

或者是在pycharm上查看