Original error was: No module named ‘numpy.core._multiarray_umath‘_original error was: no module named 'numpy.core._m

今天卸载了Python2.6.8，安装了python 3.9。发现之前可以跑得matplotlib相关的程序不能运行，显示如下错误：

Please note and check the following:
 
  * The Python version is: Python3.9 from "C:\python\python.exe"
  * The NumPy version is: "1.19.2"
 
and make sure that they are the versions you expect.
Please carefully study the documentation linked above for further help.
 
Original error was: No module named 'numpy.core._multiarray_umath'

通过卸载重装解决问题

pip uninstall numpy
 
pip install --upgrade numpy
#或者
pip  install numpy -i https://pypi.tuna.tsinghua.edu.cn/simple