Python marshmallow.fields 模块，Method() 实例源码

def test_field_decorated_method():
    parameter = build_parameter(TestSchema().fields["decorated"])
    assert_that(parameter, is_(equal_to({
        # NB: default for `fields.Method` is "object"
        "type": "string",
    })))

def schema():
    class BasicSchema(Schema):
        class Meta:
            ordered = True
        foo = fields.Integer(attribute='@#')
        bar = fields.String()
        raz = fields.Method('raz_')
        meh = fields.String(load_only=True)
        blargh = fields.Boolean()

        def raz_(self, obj):
            return 'Hello!'
    return BasicSchema()