Silenced a Python 2 ImportWarning in a migrations test.

import re

import tokenize

import unittest

import warnings

from django.core.validators import RegexValidator, EmailValidator

from django.db import models, migrations

                migration = migrations.Migration('0001_initial', app.split('.')[-1])

                expected_path = os.path.join(base_dir, *(app.split('.') + ['migrations', '0001_initial.py']))

                writer = MigrationWriter(migration)

                # Silence warning on Python 2: Not importing directory

                # 'tests/migrations/migrations_test_apps/without_init_file/migrations':

                # missing __init__.py

                with warnings.catch_warnings():

                    warnings.filterwarnings("ignore", category=ImportWarning)

                    self.assertEqual(writer.path, expected_path)

    def test_custom_operation(self):