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Python 3 Subprocess Module Tutorial to Run Terminal & Shell Commands Programmatically
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Jun 3, 2025
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0:00
uh hello guys welcome to this video so
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in this video I will show you a very
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important uh module inside Python which
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lets you execute terminal and shell
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commands programmatically using a Python
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script so terminal commands are those
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commands which you directly open your
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command line and then execute those
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commands so let's suppose if I want to
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print out the version of which version
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of Python is installed so I will
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directly open command line and execute
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this command and I will get this output
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so now just imagine you want to execute
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this same command not through directly
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opening the command line rather than you
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want to open a Python script which will
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automatically do this for you
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programmatically so in this video I will
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show you a module here which is built in
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inside Python which lets you do this so
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the name of the module is subprocess so
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first of all you just need to import
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this module here like this subprocess so
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it's a built-in module you did not have
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to install it so you simply import this
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module like this and after that you
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simply
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uh just call a simple function which is
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present inside this module here which is
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call so you simply call this function
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like this and here you specify which
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command you want to execute so inside
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double quotes you simply write here
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python and then put a comma and
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then d- version so we are executing the
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same command here you will see using
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programmatically using a python script
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using this mod module and uh then to
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print out the result here we can simply
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print out the
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result so that's all that we need to do
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right here and if I just execute this
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python app py so you will actually
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see it will print out and execute this
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command and print out the result which
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comes so you will see python
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3.10.5 so it is printing out the exact
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result that we if I try to print this
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command
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directly so in this is a really useful
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and a powerful module as well because
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many a times you need to execute the
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shell commands or terminal commands
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inside your Python script so if you're
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making some kind of a terminal
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application then this module is very
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much helpful
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subprocess so let's suppose you also
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need to print out which version is uh
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ffmppg in installed
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so you can just write ffmpg dash version
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so it will now also print out which
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version of uh ffmppg installed so in
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this way you can execute multiple
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commands so if I just execute the python
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script here you will see that first it
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will print out the python version and
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then it will go to the next command and
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then it will print out the ffmpg version
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so any command line utility kind of
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application you can build using this
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module and uh there is also an uh new
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way which you can do the same
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process uh the second way is to import
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the operating system module and simply
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calling the system method and here you
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specify the same command here python-
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version and
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again so this this method is little bit
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easier because uh the syntax is little
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bit easier you will see how easy it is
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to remember this
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so I personally like this
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method more as compared to the previous
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one so you will see both the results
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both the methods will return the same
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result to you so you just need to decide
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which one
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to so if I just execute this now you
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will see it will also return the same
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result you will see that so these are
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the two ways by which you can execute uh
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terminal and
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uh terminal commands inside your Python
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application programmatically
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so first through subprocess module and
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secondly through operating system module
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so thank you very much for watching this
4:25
video and also check out my website
4:28
freemediatoolsh.com uh which contains
4:30
thousands of tools
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