can you check what is wrong with def vote(request, question_id), i am not able to run server. The exceptions and my views.py code are wrriten below:

[Avitab Ayan Sarmah]

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):

... # Same as above, no changes needed.

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()

        # Always return an HttpResponseRedirect after successfully dealing

        # with POST data. This prevents data from being posted twice if a

        # user hits the Back button.

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

Exceptions:

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x00000261B72329D8>

Traceback (most recent call last):

  File "c:\python36\lib\site-packages\django\utils\autoreload.py", line 225, in wrapper

    fn(*args, **kwargs)

  File "c:\python36\lib\site-packages\django\core\management\commands\runserver.py", line 121, in inner_run

    self.check(display_num_errors=True)

  File "c:\python36\lib\site-packages\django\core\management\base.py", line 364, in check

    include_deployment_checks=include_deployment_checks,

  File "c:\python36\lib\site-packages\django\core\management\base.py", line 351, in _run_checks

    return checks.run_checks(**kwargs)

  File "c:\python36\lib\site-packages\django\core\checks\registry.py", line 73, in run_checks

    new_errors = check(app_configs=app_configs)

  File "c:\python36\lib\site-packages\django\core\checks\urls.py", line 40, in check_url_namespaces_unique

    all_namespaces = _load_all_namespaces(resolver)

  File "c:\python36\lib\site-packages\django\core\checks\urls.py", line 57, in _load_all_namespaces

    url_patterns = getattr(resolver, 'url_patterns', [])

  File "c:\python36\lib\site-packages\django\utils\functional.py", line 36, in __get__

    res = instance.__dict__[self.name] = self.func(instance)

  File "c:\python36\lib\site-packages\django\urls\resolvers.py", line 536, in url_patterns

    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)

  File "c:\python36\lib\site-packages\django\utils\functional.py", line 36, in __get__

    res = instance.__dict__[self.name] = self.func(instance)

  File "c:\python36\lib\site-packages\django\urls\resolvers.py", line 529, in urlconf_module

    return import_module(self.urlconf_name)

  File "c:\python36\lib\importlib\__init__.py", line 126, in import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 978, in _gcd_import

  File "<frozen importlib._bootstrap>", line 961, in _find_and_load

  File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked

  File "<frozen importlib._bootstrap>", line 655, in _load_unlocked

  File "<frozen importlib._bootstrap_external>", line 678, in exec_module

  File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed

  File "C:\Users\AVITABAYAN\mysite\mysite\urls.py", line 5, in <module>

    path('', include('polls.urls')),

  File "c:\python36\lib\site-packages\django\urls\conf.py", line 34, in include

    urlconf_module = import_module(urlconf_module)

  File "c:\python36\lib\importlib\__init__.py", line 126, in import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 978, in _gcd_import

  File "<frozen importlib._bootstrap>", line 961, in _find_and_load

  File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked

  File "<frozen importlib._bootstrap>", line 655, in _load_unlocked

  File "<frozen importlib._bootstrap_external>", line 678, in exec_module

  File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed

  File "C:\Users\AVITABAYAN\mysite\polls\urls.py", line 3, in <module>

    from . import views

  File "C:\Users\AVITABAYAN\mysite\polls\views.py", line 31

    try:

       ^

IndentationError: unindent does not match any outer indentation level

[Matthew Pava]

Hi Avitab,

The exception message tries to explain it to you.

“IndentationError: unindent does not match any outer indentation level”

Python expects perfect whitespace with your code, and you can’t mix spaces with tabs.

In your view function, you are indenting with 4 spaces most of the time, but your first line in the function is with a tab.

I recommend using an IDE such as PyCharm to help alleviate this issue so you don’t run into it again.

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