How to set label in django forms

from django.utils.translation import ugettext_lazy as _

class AuthorForm(ModelForm):

    class Meta:

        model = Author

        fields = ('name', 'title', 'birth_date')

        labels = {

            'name': _('Writer'),

        }

        help_texts = {

            'name': _('Some useful help text.'),

        }

        error_messages = {

            'name': {

                'max_length': _(&quotThis writer's name is too long.&quot),

            },

        }