How to pass an environment variable as a command line parameter in Run/Debug configuration in PyCharm?

Question

I am trying to learn PyCharm, need to pass an environment variable as a command line parameter to my process, e.g. execute an equivalent of myScript.py -u $myVar

Answer 1

I wasn't able to define new env vars for passing them to Run/Debug configuration (as suggested by @alok-a), even if defining them on a script executed in "Before Launch". For notice, I'm using PyCharm 2018.3.4.

The workaround that works for me is to create a python script that prepare the full command line and calls it using the subprocess module.

import subprocess

# Build params line

cmd = ["python", script_path] + params.split()

subprocess.run(cmd)

Set your breakpoints in the target script (the one indicated by script_path).

Run the newly created wrapper script and have a happy debugging. Not a charming solution, but it works at least.