test.py

import os
import subprocess

def get_submodule_paths ():
    submodule_paths = []
    with open ('.gitmodules') as file:
        for line in file:
            if 'path =' in line:
                path = line.strip ().split ('= ')[1]
                submodule_paths.append (path)
    return submodule_paths

submodule_paths = get_submodule_paths ()

# initiate test runs
for module_dir in submodule_paths:
    os.chdir (module_dir)
    print (f"Entering {module_dir}")
    if os.path.isfile ('requirements.txt'):
        subprocess.run (['pip', 'install', '-r', 'requirements.txt'], check = True)
    subprocess.run (['python', '-u', 'test.py'], check = True)
    os.chdir ('..')
    print (f"Exiting {module_dir}")