完整报错长这样：

C:\Users\pc-01>pip install numpy
Looking in indexes: https://pypi.douban.com/simple
Collecting numpy
  ERROR: Could not find a version that satisfies the requirement numpy (from versions: none)
ERROR: No matching distribution found for numpy

可能是豆瓣镜像的问题，换源，问题解决

pip config set global.index-url https://mirrors.aliyun.com/pypi/simple/