add polls app

polls/admin.py

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+from django.contrib import admin
+
+# Register your models here.

polls/apps.py

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+from django.apps import AppConfig
+
+
+class PollsConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'polls'

polls/models.py

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+from django.db import models
+
+# Create your models here.

polls/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

polls/urls.py

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+from django.urls import path
+
+from . import views
+
+urlpatterns = [
+    path('', views.index, name='index'),
+
+]

polls/views.py

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+from django.shortcuts import render
+from django.http import HttpResponse
+
+
+# Create your views here.
+
+def index(request):
+    return HttpResponse("Hello, Django. U are at the polls index")