Dynamic env variables load from .env file while executing manage.py <command>

manage.py

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

if __name__ == "__main__":
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "src.settings.base")

    from django.core.management import execute_from_command_line
    
    # ---------- 5 lines ------------
    with open('.env') as f:
        for e in f.readlines():
            if e.strip():
                k, v = list(map(lambda x: x.strip(), e.split('=', 1)))
                os.environ.setdefault(k, v)

    execute_from_command_line(sys.argv)