Missing module in import statement

[jaaruiz@…]

A necessary module is not being imported in one of the examples. The example is located at ​https://docs.djangoproject.com/en/dev/intro/tutorial02/

The example code is as follows:

from django.contrib import admin
from polls.models import Poll

class ChoiceInline(admin.StackedInline):
    model = Choice
    extra = 3

class PollAdmin(admin.ModelAdmin):
    fieldsets = [
        (None,               {'fields': ['question']}),
        ('Date information', {'fields': ['pub_date'], 'classes': ['collapse']}),
    ]
    inlines = [ChoiceInline]

admin.site.register(Poll, PollAdmin)

The second line of the code should also import the `Choice' model as follows:
from polls.models import Poll, Choice