You are using pip version 9.0.1, however version 19.2.3 is available. You should consider upgrading

You are using pip version 9.0.1, however version 19.2.3 is available.You should consider upgrading via the 'python -m pip install --upgrade pip' command.

1.輸入python -m pip install --upgrade pip,仍然彈出該錯誤。

2.查閱網上帖子，有提到可能是Python問題，64位安裝了32位的Python,輸入python -v 命令，果然如此。

3.卸載後下載安裝64位版本。 再次運行，成功！