(self, instance, value)
Set the ``value`` for this :class:`Field` in a ``instance``
of a :class:`StdModel`.
Set the ``value`` for this :class:`Field` in a ``instance``
of a :class:`StdModel`.
Set the value for this : class : Field in a instance of a : class : StdModel .
def set_value(self, instance, value):
        '''Set the ``value`` for this :class:`Field` in a ``instance``
of a :class:`StdModel`.'''
        setattr(instance, self.attname, self.to_python(value))
def set_value ( self , instance , value ) : setattr ( instance , self . attname , self . to_python ( value ) )