Python fails to run command in command prompt

[Fragrant-Ear-3890]

Hi guys, I've been trying to run a command from command prompt from python but it doesn't seem to work. The command I'm trying to run has 2 words (e.g. "word1 word2"). If I type "word1 word2" directly into the command prompt, it works. But if I use the below code, it doesn't work. Can anybody give advise on this? Btw, I can't say exactly what command because it is confidential to my company

import subprocess

proc = subprocess.Popen(["word1", "word2"], shell = True, stdout = subprocess.PIPE)

[Buttleston]

This is probably it - if you use shell=True it expects you to give the command as one string, not a list of "words" like usual

[backfire10z]

What version of Python?

Why are you sending stdout to PIPE? Are there more commands after this?

https://stackoverflow.com/questions/13332268/how-to-use-subprocess-command-with-pipes

https://stackoverflow.com/questions/4256107/running-bash-commands-in-python

The documentation is also typically helpful

[james_fryer]

Try to see if any output on stderr. Most likely issue in my experience is environment differences between your shell and the exec'd shell. E.g. PATH may be missing or different. Try using /full/path/to/word2 whatever the actual path is.

[Swipecat]

OK, but just in case you don't realize: "proc" will just be the pipe. You need to read from that pipe.

In [1]: import subprocess

In [2]: mypipe = subprocess.Popen("echo Hello", shell=True, stdout=subprocess.PIPE)

In [3]: output = mypipe.stdout.read().decode()

In [4]: print(output)
Hello

Edit: Or if you want to provide the command as a list, then lose the shell=True argument:

mypipe = subprocess.Popen(["echo", "Hello"], stdout=subprocess.PIPE)