pip3' is not recognized as an internal or external command, code example
Example 1: 'pip' is not recognized as an internal or external command, operable program or batch file.
py -m pip install [packagename]
Example 2: add pip to path
import os
import sys
pipPath = f'{os.path.dirname(sys.executable)}\\Scripts'
os.system(f'setx PATH "%PATH%;{pipPath}"')