reading data from command line

[snippsat]

Do not use os.system() it's deprecated and unsafe,use subprocess .
Example i check for module/package,if it's in outdated list i upgrade it.

import subprocess

out = subprocess.run(['pip', 'list', '--outdated'], capture_output=True)
response = out.stdout.decode()
module_name = 'click'
if module_name in response:
    subprocess.run(['pip', 'install', module_name, '--upgrade'])
else:
    print(f'No module with name <{module_name}> found')

Output:
E:\div_code
λ python sub_2.py
Collecting click
  Using cached https://files.pythonhosted.org/packages/fa/37/45185cb5abbc30d7257104c434fe0b07e5a195a6847506c074527aa599ec/Click-7.0-py2.py3-none-any.whl
Installing collected packages: click
  Found existing installation: click 6.7
    Uninstalling click-6.7:
      Successfully uninstalled click-6.7
Successfully installed click-7.0

I only use pip list in a virtual envorioment,as OS is mess because i do test a lot often to help users install problem on forum.
So i have many modules/package that i don't care about or want to update.