cannot import name 'SCHEME_KEYS'

当出现错误消息"ImportError: cannot import name 'SCHEME_KEYS'"时，一种解决方法是重新安装pip库。首先，你可以在cmd中输入以下命令来更新pip库：
python -m ensurepip
接下来，找到pip库的位置并删除文件夹。然后，使用以下命令重新安装pip库：
python -m ensurepip
最后，你可以使用以下命令来更新pip库：
python -m pip install --upgrade pip
通过执行这些步骤，你应该能够解决pip报错的问题。这种方法通常可以解决大多数pip相关的错误。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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