def get_default_recipients(self):
        ''' Overrides EmailRecipientMixin '''
        return [x.registration.customer.email for x in self.eventregistration_set.filter(cancelled=False)]
def get_default_recipients ( self ) : return [ x . registration . customer . email for x in self . eventregistration_set . filter ( cancelled = False ) ]
Overrides EmailRecipientMixin