DjangoのmakemigrationsのところでTypeError: 'module' object is not iterableエラー

Question

PythonのDjangoにて、アプリを作っています。

#悩んでいること

models.pyを作ってmakemigrationsをしたところエラーが出ました。

Traceback (most recent call last):
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\urls\resolvers.py", line 590, in url_patterns
    iter(patterns)
TypeError: 'module' object is not iterable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "manage.py", line 21, in <module>
    main()
  File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\core\management\__init__.py", line 401, 
in execute_from_command_line
    utility.execute()
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\core\management\__init__.py", line 395, 
in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\core\management\base.py", line 328, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\core\management\base.py", line 366, in execute
    self.check()
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\core\management\base.py", line 395, in check
    include_deployment_checks=include_deployment_checks,
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\core\management\base.py", line 382, in _run_checks
    return checks.run_checks(**kwargs)
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\core\checks\registry.py", line 72, in run_checks
    new_errors = check(app_configs=app_configs)
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\core\checks\urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\core\checks\urls.py", line 23, in check_resolver
    return check_method()
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\urls\resolvers.py", line 408, in check  
    messages.extend(check_resolver(pattern))
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\core\checks\urls.py", line 23, in check_resolver
    return check_method()
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\urls\resolvers.py", line 407, in check  
    for pattern in self.url_patterns:
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\Windows\Documents\pythonfiles\django\venv\tutorial\lib\site-packages\django\urls\resolvers.py", line 597, in url_patterns
    raise ImproperlyConfigured(msg.format(name=self.urlconf_name))
django.core.exceptions.ImproperlyConfigured: The included URLconf '<module 'twitterdata.urls' from 'C:\Users\Windows\Documents\pythonfiles\django\venv\twitterproject\twitterdata\urls.py'>' does not appear to have any patterns in it. If you see valid patterns in the file then the issue is probably caused by a circular import.

modeles.pyのコードは下記です。

from django.db import models

# Create your models here.
class TwitterModel(models.Model):

    class Meta:
        #テーブル名の指定
        db_table ="category"

    user_name = models.CharField(max_length=140)
    user_id = models.CharField(max_length=140)
    user_img = models.CharField(max_length=140)
    user_text = models.TextField(null=True)
    user_created_at = models.CharField(max_length=140)

#解決のために試したこと
コードを修正したりして、何度もmakemigrationsしてみたのですが、
同じエラーとなります。

OS、環境
Django　3.0.5
Python3.7.3
仮想環境:venv

調べているのですが、解決策が見つかりません。

お知恵お貸しいただけると助かります。

Answer 1

djangoでプロジェクトを作成した時に最初に
urls.pyでアプリ下のまだ作成していないurls.pyをincludeで呼び出していたのが原因でした。

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', include('twitterdata.urls')),
]

を

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('admin/', admin.site.urls),
]

のように修正して解決しました。