Running Shell Commands using Python (Detailed Explanation)

In this video, learn how to run shell commands using Python. This is useful when your python program has to interact with another program via its CLI. All the concepts have been explained in detail.

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More awesome topics covered here:

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#python #shell #command

[IndianPythonista]

2:32 Old methods of running shell commands (os.system, os.popen, os.spawn)
7:25 Introduction to subprocess module
11:05 Run command and read output
15:43 Run command by passing single string (shell parameter)
16:40 Security considerations while using shell paramter
22:58 Run command and pass input
26:50 Run command with timeout
27:56 Run command and throw error if fail

[makingachanneltopost]

Nice video! Quick note, shell is '/bin/sh', not '/usr/sh' :-)

[jackeyzhu]

perfect vid! at the very end of the vid, you showed how to check if there is an error. I'm wondering how to not only check for error but also what specifically the error is about. How would you recommend doing it?

[grumpy_techo]

Nice useful video - thanks for making this available

[amandubey]

how do I edit files(files like cat/etc/hosts or etc/selinux/config (the things that we can edit using vim or nano on terminal)) by using python(like i run the .py file in terminal and that file gets edited instead of me manually editing it) pls help if someone has any clue, or pls give me videos/ links related to this if anyone knows. need help

[vivekdabholkar]

#p = subprocess.run(["python3", "universal.py"], shell=True, capture_output=True, input='SP600-6')
#p = subprocess.run(["python3", "universal.py"], capture_output=True, input="SP600-6".encode(), text=True)
p = subprocess.run(["python3", "universal.py"], capture_output=True, stdin=open("a.txt", 'r'))
None of the above work? What am I doing wrong on windows machine?

[fstreamdl]

Hey Bro what if the shell command I am executing does need another input in the middle of processing. Like it needs to press Y/N to confirm the execution.
How can i do this.

[prashanabalaji]

I have echo $1 in my shell script...I am trying to pass Hello as parameter/ input from python script.Any idea

[amangoyal]

Hi, I am getting error in using this subprocess to open the hostapd file in terminal of rasbian software. I am getting the error " Too many errors from stdin "

[kapilsonyt]

You are an amazing person. Thats what I was looking for. Thank you Sir!

[axosolaman]

Bro faceing issue
subprocess' has no attribute 'run
how to fix it

[utkarshshrivastava]

is there any way to run multiple shell commands in the same process instance? like reusing Popen?

[axosolaman]

Thanks for this video love you brother

[hirakhax]

os kya hei bro? And what is the theme ?

[srinivaskalwad]

Hi this video was so interesting. I have stuck in one of the issue while using this run with minicom.
problem : running this command ["minicom", "-D", "/dev/ttyUSB1"] after this i will turn on device that will start booting for 30 secs and it will ask for inputs. how to do that?
is running commands once minicom triggered is it possible?

[yeswanthkumar]

How to awk command in python, I tried using it with subprocess but getting below error .

awk is not recognised as an internal or external command .

[DhimanGhoshYT]

My doubt is suppose I have a bat/shell script file that accepts multiple user inputs... So how can we execute this bat file from the python script and even handle/automate the user inputs from python script itself?

[balbinodejesus]

Very, very, Very good!
Thank you Very much!

[futuregootecks]

Wow that was so helpful!! I didn’t realize how straightforward it could be with the subprocess module.

I was so overwhelmed I tried to just write a bash script instead to run shell commands but that ended up taking forever because my bash skills aren’t that good yet.

Thanks and Keep up the great work!

[anonnewuserp]

Hi Nikhil, your tutorials are very informative. Thanks for uploading!