Get's the current logged in user in macOS using Python.

get_console_user.py

#!/usr/local/bin/python3
import subprocess

def termy(cmd):
    task = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    out, err = task.communicate()
    return(out.decode('utf-8'), err)

user, err = termy(
    ['/usr/bin/stat', '-f', '"%Su"', '/dev/console']
)

user = user.replace('"', '').strip()

if user == 'root':
    user, err = termy([
        "/usr/bin/defaults", "read",
        "/Library/Preferences/com.apple.loginwindow.plist", "lastUserName"
    ])

user = user.strip()

print(user)