Detects logged in user even under sudo

detect_active_login

#!/usr/bin/env python
import os
import psutil

if __name__ == "__main__":
    p = psutil.Process(os.getpid())
    while p and p.username == 'root':
        p = p.parent
    print p.username if p else 'root'

setup.py

#!/usr/bin/env python
from distutils.core import setup
setup(name='detect_active_login', scripts=['detect_active_login'], require=['psutil'])