报错信息：
python3 -m pip install --upgrade pip
WARNING: Value for scheme.platlib does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /opt/homebrew/lib/python3.9/site-packages
sysconfig: /opt/homebrew/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages
WARNING: Value for scheme.purelib does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /opt/homebrew/lib/python3.9/site-packages
sysconfig: /opt/homebrew/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages
WARNING: Value for scheme.headers does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /opt/homebrew/include/python3.9/UNKNOWN
sysconfig: /opt/homebrew/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/include/python3.9
WARNING: Value for scheme.scripts does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /opt/homebrew/bin
sysconfig: /opt/homebrew/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/bin
WARNING: Value for scheme.data does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /opt/homebrew
sysconfig: /opt/homebrew/opt/python@3.9/Frameworks/Python.framework/Versions/3.9
WARNING: Additional context:
user = False
home = None
root = None
prefix = None
Requirement already satisfied: pip in /opt/homebrew/lib/python3.9/site-packages (21.1)
WARNING: Value for scheme.platlib does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /opt/homebrew/lib/python3.9/site-packages
sysconfig: /opt/homebrew/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages
WARNING: Value for scheme.purelib does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /opt/homebrew/lib/python3.9/site-packages
sysconfig: /opt/homebrew/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages
WARNING: Value for scheme.headers does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /opt/homebrew/include/python3.9/UNKNOWN
sysconfig: /opt/homebrew/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/include/python3.9
WARNING: Value for scheme.scripts does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /opt/homebrew/bin
sysconfig: /opt/homebrew/opt/python@3.9/Frameworks/Python.framework/Versions/3.9/bin
WARNING: Value for scheme.data does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: /opt/homebrew
sysconfig: /opt/homebrew/opt/python@3.9/Frameworks/Python.framework/Versions/3.9
WARNING: Additional context:
user = False
home = None
root = None
prefix = None解决方法：
这个报错是一个警告，也不会影响任何安装逻辑。可以安全地使用当前pip，暂时忽略此警告。
如果想要消除此警告，可以尝试升级指定版本。
python -m pip install pip==21.0.1
或者，尝试在虚拟环境中升极
python3 -m venv venv
source ./venv/bin/activate
pip install --upgrade pip