1. Matplotlib's official website to download the corresponding PC version, available at: https: //pypi.org/project/matplotlib/#files
2. python will be placed in the Scripts directory files downloaded .whl
3.cmd open a command prompt, enter Scripts directory
4. Enter the installation command: pip install matplotlib-3.1.1-cp37-cp37m-win_amd64.whl (file name you downloaded the file)
It represents a successful installation