py.py

from apps.rp.models.Permission import CustomPermission
CustomPermission.patch_model_attributes()

from django.contrib.auth.models import Permission
from django.db import models

class CustomPermission(object):
    @classmethod
    def patch_model_attributes(cls):
        method = getattr(Permission, 'add_to_class')
        method('name', models.CharField(
            max_length=150,
        ))