Hw to use subprocess Popen in Python and how redirects work with both options?

General Discussions
2

subprocess.Popen is a more flexible option for running external programs as it allows you to interact with the process (e.g., read from/write to stdin, stdout, stderr). It gives you full control over the execution and management of the process.

Here’s how you can use Popen to run a command and redirect the output: import subprocess

# Using Popen for full control
with open('output', 'w') as outfile:
    process = subprocess.Popen(['./my_script.sh'], stdout=outfile, stderr=subprocess.PIPE)
    process.wait()  # Wait for the process to complete

Popen starts the process, and we redirect stdout to the output file. The stderr is captured separately, but you can handle it as needed. process.wait() ensures the script runs to completion before continuing.