How Can I Retrieve Output from subprocess.call()?

Retrieving Output from Subprocesses Using Subprocess.call()

To retrieve the output from a subprocess launched using subprocess.call(), you can leverage the capabilities of the subprocess module. Here's how:

For Python Version 2.7 and Later:

Utilize subprocess.check_output():

import subprocess

output = subprocess.check_output(["ping", "-c", "1", "8.8.8.8"])

This approach returns the standard output as a string, effectively handling the output retrieval task.

For Python Versions Prior to 2.7:

You can redirect the output using the shell:

import subprocess

process = subprocess.Popen(["ping", "-c", "1", "8.8.8.8"], shell=True, stdout=subprocess.PIPE)

# Read the output
output = process.communicate()[0]

Additional Notes:

• This method is suitable for simple commands.
• When using subprocess.Popen(), ensure the stdout parameter is set to subprocess.PIPE to retrieve the output.
• If the command utilizes Linux syntax, remember to adjust it accordingly for Windows.

For further details and alternative approaches, refer to the comprehensive explanation provided in this other answer.

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