import datetime

from django.db import models
from django.utils import timezone

class Question(models.Model):
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('Datum publikovani')
    def __unicode__(self):              # __unicode__ on Python 2 ; __str__ on Python 3
        return self.question_text


class Choice(models.Model):
    question = models.ForeignKey(Question)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)
    def __unicode__(self):              # __unicode__ on Python 2 ; __str__ on Python 3
        return self.choice_text
    def was_published_recently(self):
        return self.pub_date >= timezone.now() - datetime.timedelta(days=1)
import datetime

from django.db import models
from django.utils import timezone

class Question(models.Model):
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')
    def __unicode__(self):              # __unicode__ on Python 2 ; __str__ on Python 3
        return self.question_text


class Choice(models.Model):
    question = models.ForeignKey(Question)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)
    def __unicode__(self):              # __unicode__ on Python 2 ; __str__ on Python 3
        return self.choice_text
    def was_published_recently(self):
        return self.pub_date >= timezone.now() - datetime.timedelta(days=1)
edit date_published