Synnefo

    r'^([a-zA-Z0-9]([a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,6}$',

    re.IGNORECASE)

class StoreUserMixin(object):

    def store_user(self, user, request):

    def clean_start_date(self):

        start_date = self.cleaned_data.get('start_date')

        if not self.precursor_application:

            if start_date and (start_date - today).days < 0:

                raise forms.ValidationError(

                _(astakos_messages.INVALID_PROJECT_START_DATE))

    def clean_end_date(self):

        start_date = self.cleaned_data.get('start_date')

        end_date = self.cleaned_data.get('end_date')

        if end_date and (end_date - today).days < 0:

            raise forms.ValidationError(

                _(astakos_messages.INVALID_PROJECT_END_DATE))