下载pyinstaller报错：You should consider upgrading via the 'python -m pip install --upgrade pip'

问题描述：

在使用Pycharm生成.exe文件的过程中，需要下载pyinstaller。
在终端中输入指令 pip install pyinstaller 后，报错：
“You are using pip version 10.0.1, however version 20.0.2 is available.
You should consider upgrading via the ‘python -m pip install --upgrade pip’ command.
”
如图：

就是要升级pip

解决方案：

输入指令：‘python -m pip install --upgrade pip’