python安装：pip install sklearn
问题：WARNING:You are using pip version 21.2.4; however, version 22.0.3 is available.
解决：使用命令更新python -m pip install --upgrade pip -i https://pypi.douban.com/simple
python安装：pip install sklearn
问题：WARNING:You are using pip version 21.2.4; however, version 22.0.3 is available.
解决：使用命令更新python -m pip install --upgrade pip -i https://pypi.douban.com/simple
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