https://i.stack.imgur.com/Us1wC.png
您好，更新 pip 后出现此错误。怎么解决的？
WARNING: Value for scheme.headers does not match. Please report this to <https://github.com/pypa/pip/issues/9617>
distutils: c:\users\bymuto\appdata\local\programs\python\python39\Include\UNKNOWN
sysconfig: c:\users\bymuto\appdata\local\programs\python\python39\Include
WARNING: Additional context:
user = False
home = None
root = None
prefix = None
答案 0 :(得分：9)
降级 pip 可解决此问题：python -m pip install pip==21.0.1