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

[Avitab Ayan Sarmah]

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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