Overriding how attributes are accessed

By default, marshmallow uses utils.get_value <marshmallow.utils.get_value> to pull attributes from various types of objects for serialization. This will work for most use cases.

However, if you want to specify how values are accessed from an object, you can override the :meth:get_attribute <marshmallow.Schema.get_attribute> method.

.. code-block:: python

class UserDictSchema(Schema):
    name = fields.Str()
    email = fields.Email()

    # If we know we're only serializing dictionaries, we can
    # use dict.get for all input objects
    def get_attribute(self, obj, key, default):
        return obj.get(key, default)