def get_username_field():
    if (1, 5) >= django.VERSION:
        from django.contrib.auth import get_user_model
        UserModel = get_user_model()
        return getattr(UserModel, 'USERNAME_FIELD', 'username')
    else:
        return 'username'
dataset/ETHPy150Open tokibito/django-ftpserver/src/django_ftpserver/compat.py/get_username_field/swapped operands of `>=`