Django snippets

import re

from django.forms.fields import email_re
from django.forms import CharField, Textarea, ValidationError
from django.utils.translation import ugettext as _


email_separator_re = re.compile(r'[^\w\.\-\+@_]+')
     
                                                                                        
def _is_valid_email(email):    
    return email_re.match(email)


class EmailsListField(CharField):

    widget = Textarea

    def clean(self, value):
        super(EmailsListField, self).clean(value)

        emails = email_separator_re.split(value)

        if not emails:
            raise ValidationError(_(u'Enter at least one e-mail address.'))

        for email in emails:
            if not _is_valid_email(email):
                raise ValidationError(_('%s is not a valid e-mail address.') % email)

        return emails