validators.py 文件源码

def validate(self, data):
        try: 
            if len(data.split('/')) != 2:
                raise ValueError('Invalid CIDR syntax')
            # need to be unicode for py27
            if sys.version_info > (3,):
                ipaddress.IPv4Network(data)
            else:
                ipaddress.IPv4Network(u'{}'.format(data))
        except (ValueError, ipaddress.AddressValueError) as e:
            raise ValidationError(e)
        return {self.field_name: data}