How to call external commands using python

https://stackoverflow.com/questions/89228/calling-an-external-command-from-python https://www.novixys.com/blog/call-external-command-python/ https://www.newbedev.com/python/howto/6-ways-to-call-external-command-in-python/ https://www.includehelp.com/python/how-to-call-an-external-command.aspx https://www.w3resource.com/python-exercises/python-basic-exercise-45.php