text: import datetime
  
  from django import forms
  from django.core.exceptions import ValidationError
  from django.utils.translation import ugettext_lazy as _
  from django.utils import timezone
  class RenewBookForm(forms.Form):
      renewal_date = forms.DateField(help_text="Enter a date between now and 4 weeks (default 3).")
      def clean_renewal_date(self):
          data = self.cleaned_data['renewal_date']
  
          # Check if a date is not in the past.
          
          if data < datetime.date.today():
              raise ValidationError(_('Invalid date - renewal in past'))
  
          # Check if a date is in the allowed range (+4 weeks from today).
      
  		
          if data > datetime.date.today() + datetime.timedelta(weeks=4):
              raise ValidationError(_('Invalid date - renewal more than 4 weeks ahead'))
  
          # Remember to always return the cleaned data.
          return data
  		
  class CreateNewUserForm(forms.Form):
      email_user = forms.EmailField(help_text='A valid email address, please.')