DjangoでHelloWorldに失敗する

Question

実現したいこと

DjangoでWebアプリをつくり始めました。

最も初歩的なHelloWorldを行いたいです。
（「Hello」という文字だけの画面をとりあえず表示したい）

settins.pyとview.pyとurls.pyを編集し、下記コマンドでDjangoを起動しましたが、エラーとなりました。

python manage.py runserver

発生している問題・エラーメッセージ

Exception in thread django-main-thread:
Traceback (most recent call last):
  File "C:\Users\circu\AppData\Local\Programs\Python\Python38\lib\threading.py", line 932, in _bootstrap_inner
    self.run()
  File "C:\Users\circu\AppData\Local\Programs\Python\Python38\lib\threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\autoreload.py", line 53, in wrapper
    fn(*args, **kwargs)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\management\commands\runserver.py", line 118, in inner_run
    self.check(display_num_errors=True)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\management\base.py", line 392, in check
    all_issues = checks.run_checks(
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\checks\registry.py", line 70, in run_checks
    new_errors = check(app_configs=app_configs, databases=databases)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\checks\urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\checks\urls.py", line 23, in check_resolver
    return check_method()
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\urls\resolvers.py", line 408, in check
    for pattern in self.url_patterns:
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\urls\resolvers.py", line 589, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\functional.py", line 48, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\urls\resolvers.py", line 582, in urlconf_module
    return import_module(self.urlconf_name)
  File "C:\Users\circu\AppData\Local\Programs\Python\Python38\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\yLineGameProject\yLineGameProject\urls.py", line 21, in <module>
    path('y_line_game_app/', include('y_line_game_app/urls')),
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\urls\conf.py", line 34, in include
    urlconf_module = import_module(urlconf_module)
  File "C:\Users\circu\AppData\Local\Programs\Python\Python38\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'y_line_game_app/urls'
Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\management\__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\management\base.py", line 330, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\management\commands\runserver.py", line 61, in execute
    super().execute(*args, **options)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\management\base.py", line 371, in execute
    output = self.handle(*args, **options)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\management\commands\runserver.py", line 96, in handle
    self.run(**options)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\core\management\commands\runserver.py", line 103, in run
    autoreload.run_with_reloader(self.inner_run, **options)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\autoreload.py", line 614, in run_with_reloader
    start_django(reloader, main_func, *args, **kwargs)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\autoreload.py", line 599, in start_django
    reloader.run(django_main_thread)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\autoreload.py", line 314, in run
    self.run_loop()
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\autoreload.py", line 320, in run_loop
    next(ticker)
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\autoreload.py", line 360, in tick
    for filepath, mtime in self.snapshot_files():
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\autoreload.py", line 376, in snapshot_files
    for file in self.watched_files():
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\autoreload.py", line 274, in watched_files
    yield from iter_all_python_module_files()
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\autoreload.py", line 105, in iter_all_python_module_files
    return iter_modules_and_files(modules, frozenset(_error_files))
  File "C:\Users\circu\PycharmProjects\yamanoteLineGameProject\pj_env\lib\site-packages\django\utils\autoreload.py", line 141, in iter_modules_and_files
    resolved_path = path.resolve(strict=True).absolute()
  File "C:\Users\circu\AppData\Local\Programs\Python\Python38\lib\pathlib.py", line 1180, in resolve
    s = self._flavour.resolve(self, strict=strict)
  File "C:\Users\circu\AppData\Local\Programs\Python\Python38\lib\pathlib.py", line 200, in resolve
    return self._ext_to_normal(_getfinalpathname(s))
OSError: [WinError 123] ファイル名、ディレクトリ名、またはボリューム ラベルの構文が間違っています。: '<frozen importlib._bootstrap>'

ModuleNotFoundError: No module named 'y_line_game_app/urls'
とのことですが、何が原因なのか、わからずにおります。

該当のソースコード

from django.shortcuts import render
from django.http import HttpResponse

# Create your views here.


def index(request):
    return HttpResponse('<h1>hello</h1>')

from django.urls import path
from . import views


app_name = 'y_line_game_app'


urlpatterns = [
    path('hello', views.index, name='index'),
]

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

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

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'y_line_game_app',
]

試したこと

二回プロジェクトをつくりなおすところからやってみましたが、結果に変わりありませんでした。

urlpatternsや、y_line_game_appはコピペすることでtypoになっていないことを確認済みです。

補足情報（FW/ツールのバージョンなど）

仮想環境でサーバ起動させようとしています。

Django:3.1.2
Pycharm
Python3.8

ファイルの構成

よろしくお願い致します。

Answer 1

urls.pyについて、
path('y_line_game_app/', include('y_line_game_app/urls')),
ではなく
path('y_line_game_app/', include('y_line_game_app.urls')),
が正しかったです。。。