The Subprocess Module Python Tutorial

So this tutorial is a lot more than just the sample code. While you probably can just get by with the others without watching the video, this one is going to probably make no sense without the video. That said:

# 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!'dir', shell=True)'echo dir', shell=True)

So what we're able to do here is communicate to the shell commands from our Python script. The reason this matters is for the same reason that we can communicate from the shell to Python. We can communicate from the shell to Python as we saw earlier, and now we see we can communicate from Python to the shell.

What makes this special, is when you realize that you can do this same thing with other languages as well. So, you can use, say, java to communicate with the shell, which then passes vars through to a python script, which then communicates back to the shell, which then goes back into the java program... or any program. You can achieve similar results with sockets as well, and it will come down to performance and preference which you choose. I find this method to be far easier, but sometimes more clumsy.

Anyway, hopefully you enjoyed.

The next tutorial:

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  • Math with Python
  • Variables Python Tutorial
  • While Loop Python Tutorial
  • For Loop Python Tutorial
  • If Statement Python Tutorial
  • If Else Python Tutorial
  • If Elif Else Python Tutorial
  • Functions Python Tutorial
  • Function Parameters Python Tutorial
  • Function Parameter Defaults Python Tutorial
  • Global and Local Variables Python Tutorial
  • Installing Modules Python Tutorial
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  • Common Errors Python Tutorial
  • Writing to a File Python Tutorial
  • Appending Files Python Tutorial
  • Reading from Files Python Tutorial
  • Classes Python Tutorial
  • Frequently asked Questions Python Tutorial
  • Getting User Input Python Tutorial
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  • Module import Syntax Python Tutorial
  • Making your own Modules Python Tutorial
  • Python Lists vs Tuples
  • List Manipulation Python Tutorial
  • Multi-dimensional lists Python Tutorial
  • Reading CSV files in Python
  • Try and Except Error handling Python Tutorial
  • Multi-Line printing Python Tutorial
  • Python dictionaries
  • Built in functions Python Tutorial
  • OS Module Python Tutorial
  • SYS module Python Tutorial
  • Python urllib tutorial for Accessing the Internet
  • Regular Expressions with re Python Tutorial
  • How to Parse a Website with regex and urllib Python Tutorial
  • Tkinter intro
  • Tkinter buttons
  • Tkinter event handling
  • Tkinter menu bar
  • Tkinter images, text, and conclusion
  • Threading module
  • CX_Freeze Python Tutorial
  • The Subprocess Module Python Tutorial
  • Matplotlib Crash Course Python Tutorial
  • Python ftplib Tutorial
  • Sockets with Python Intro
  • Simple Port Scanner with Sockets
  • Threaded Port Scanner
  • Binding and Listening with Sockets
  • Client Server System with Sockets
  • Python 2to3 for Converting Python 2 scripts to Python 3
  • Python Pickle Module for saving Objects by serialization
  • Eval Module with Python Tutorial
  • Exec with Python Tutorial