python3.9安装pip

在Windows上使用 Python

中文DOC

英文doc

https://packaging.python.org/tutorials/installing-packages/

If that still doesn’t allow you to run python -m pip:

• Securely Download get-pip.py 1

• Run python get-pip.py. 2 This will install or upgrade pip. Additionally, it will install setuptools and wheel if they’re not installed already.

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