Django, tutorial - error: No module named urls
<p>Hi I am following the tutorial to make first web app by Django(<a href="https://docs.djangoproject.com/en/1.10/intro/tutorial01/#write-your-first-view" rel="nofollow noreferrer">link</a>)
But I was given this error:</p>

<pre><code> File "c:\Python27\lib\site-packages\django\utils\autoreload.py", line 226, in wrapper
    fn(*args, **kwargs)
   File "c:\Python27\lib\site-packages\django\core\management\commands\runserver.py", line 121, in inner_run
    self.check(display_num_errors=True)
   File "c:\Python27\lib\site-packages\django\core\management\base.py", line 374, in check
    include_deployment_checks=include_deployment_checks,
   File "c:\Python27\lib\site-packages\django\core\management\base.py", line 361, in _run_checks
    return checks.run_checks(**kwargs)
   File "c:\Python27\lib\site-packages\django\core\checks\registry.py", line 81, in run_checks
    new_errors = check(app_configs=app_configs)
   File "c:\Python27\lib\site-packages\django\core\checks\urls.py", line 14, in check_url_config
    return check_resolver(resolver)
   File "c:\Python27\lib\site-packages\django\core\checks\urls.py", line 24, in check_resolver
    for pattern in resolver.url_patterns:
   File "c:\Python27\lib\site-packages\django\utils\functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
   File "c:\Python27\lib\site-packages\django\urls\resolvers.py", line 313, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
   File "c:\Python27\lib\site-packages\django\utils\functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
   File "c:\Python27\lib\site-packages\django\urls\resolvers.py", line 306, in urlconf_module
    return import_module(self.urlconf_name)
   File "c:\Python27\lib\importlib\__init__.py", line 37, in import_module
    __import__(name)
   File "c:\Python27\Proj\mysite\mysite\urls.py", line 7, in &lt;module&gt;
    url(r'^polls/', include('polls.urls'))
   File "c:\Python27\lib\site-packages\django\conf\urls\__init__.py", line 50, in include
    urlconf_module = import_module(urlconf_module)
   File "c:\Python27\lib\importlib\__init__.py", line 37, in import_module
    __import__(name) ImportError: No module named urls
</code></pre>

<p>I have read some answers here on SO, but they suggest that this error is caused by wrong version of framework, which is not my case.  My version of python is 2.7 and Djanog 1.10.1</p>

<p>My urls.py</p>

<pre><code>from django.conf.urls import url, include


from django.contrib import admin

urlpatterns = [
    url(r'^polls/', include('polls.urls'))    ]
</code></pre>

<p>Thank you.</p>

<p>EDIT:</p>

<p>File: polls/urls.py</p>

<pre><code>from django.conf.urls import url

from . import views

urlpatterns = [
    url(r'^$', views.index, name='index'),
]
</code></pre>

<p>EDIT 2:</p>

<p>Thank all for your comments. There is my file structure of the project.</p>

<p><a href="https://i.stack.imgur.com/5eYEX.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5eYEX.png" alt="enter image description here"></a></p>