43. subprocess.py

'''
The subprocess module lets you do any commands that you would normally do
via your shell. If you recall before, the sys module let us communicate
from the shell to our script, now we can communicate from our script to the
shell, besides with just simple error msgs. 
'''


# This tutorial is best followed in a shell / command prompt.
# Open yours up, type python, or python3, and then follow.
import subprocess

# Say you are on windows:
# module  call command in the shell
# you can change that if you'd like, eventually.
# IF YOU ARE NOT IN A SHELL, YOU WILL SEE NO OUTPUT!
subprocess.call('dir', shell=True)


subprocess.call('echo dir', shell=True)