While going through Django tutorial i commited an error because of which i am not able to execute python manage.py runserver. The exceptions and codes are mentioned below: In exception it is mentioned code error is in index.html line 4

Exceptions:

PS C:\Users\AVITABAYAN\mysite> python manage.py runserver

Performing system checks...

System check identified no issues (0 silenced).

May 08, 2018 - 22:00:28

Django version 2.0.1, using settings 'mysite.settings'

Starting development server at http://127.0.0.1:8000/

Quit the server with CTRL-BREAK.

Internal Server Error: /

Traceback (most recent call last):

  File "c:\python36\lib\site-packages\django\core\handlers\exception.py", line 35, in inner

    response = get_response(request)

  File "c:\python36\lib\site-packages\django\core\handlers\base.py", line 158, in _get_response

    response = self.process_exception_by_middleware(e, request)

  File "c:\python36\lib\site-packages\django\core\handlers\base.py", line 156, in _get_response

    response = response.render()

  File "c:\python36\lib\site-packages\django\template\response.py", line 106, in render

    self.content = self.rendered_content

  File "c:\python36\lib\site-packages\django\template\response.py", line 83, in rendered_content

    content = template.render(context, self._request)

  File "c:\python36\lib\site-packages\django\template\backends\django.py", line 61, in render

    return self.template.render(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 175, in render

    return self._render(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 167, in _render

    return self.nodelist.render(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 943, in render

    bit = node.render_annotated(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 910, in render_annotated

    return self.render(context)

  File "c:\python36\lib\site-packages\django\template\defaulttags.py", line 314, in render

    return nodelist.render(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 943, in render

    bit = node.render_annotated(context)

  File "c:\python36\lib\site-packages\django\template\base.py", line 910, in render_annotated

    return self.render(context)

  File "c:\python36\lib\site-packages\django\template\defaulttags.py", line 211, in render

    nodelist.append(node.render_annotated(context))

  File "c:\python36\lib\site-packages\django\template\base.py", line 910, in render_annotated

    return self.render(context)

  File "c:\python36\lib\site-packages\django\template\defaulttags.py", line 447, in render

    url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)

  File "c:\python36\lib\site-packages\django\urls\base.py", line 88, in reverse

    return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))

  File "c:\python36\lib\site-packages\django\urls\resolvers.py", line 632, in _reverse_with_prefix

    raise NoReverseMatch(msg)

django.urls.exceptions.NoReverseMatch: Reverse for 'detail' with arguments '(1,)' not found. 1 pattern(s) tried: ['\\<int\\:pk\\/$']

[08/May/2018 22:00:42] "GET / HTTP/1.1" 500 134672

views.py:

from django.shortcuts import get_object_or_404, render

from django.http import HttpResponseRedirect

from django.urls import reverse

from django.views import generic

from . models import Choice, Question

class IndexView(generic.ListView):

template_name = 'polls/index.html'

context_object_name = 'latest_question_list'

def get_queryset(self):

"""Return the last five published questions."""

return Question.objects.order_by('-pub_date')[:5]

class DetailView(generic.DetailView):

model = Question

template_name = 'polls/detail.html'

class ResultsView(generic.DetailView):

model = Question

template_name = 'polls/results.html'

def vote(request, question_id):

question = get_object_or_404(Question, pk=question_id)

try:

selected_choice = question.choice_set.get(pk=request.POST['choice'])

except (KeyError, Choice.DoesNotExist):

#Redisplay the question voting form.

return render(request, 'polls/detail.html', {

'question': question,

'error_message': "you didn't select a choice.",

})

else:

selected_choice.votes +=1

selected_choice.save()

#...

#...

#...

return HttpResponseRedirect(reverse('polls:results', args=(question.id,)))

index.html:

{% if latest_question_list %}

  <ul>

  {% for question in latest_question_list %}

      <li><a href="{% url 'polls:detail' question.id %}">{{

question.question_text }}</a></li>

  {% endfor %}

  </ul>

{% else %}

  <p>No polls are available.</p>

{% endif %}

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