报错原因：
ERROR: pip's dependency resolver does not currently take into account all the packages that are installed.
This behaviour is the source of the following dependency conflicts.
scipy 1.7.3 requires numpy<1.23.0,>=1.16.5, but you have numpy 1.15.1 which is incompatible.
报错解析：
已经安装的ccipy 1.7.3包，至少要求numpy的版本是1.16.5，安装的numpy是1.15.1，二者有冲突
解决办法：
pip install -U numpy==1.16.5
安装1.16.5版本的numpy