default_values.rst

Default Values

Some data will come to you with fields missing. In these cases, a default is often known. To do this, simply decorate your class like this:

@deserialize.default("value", 0)
class IntResult:
    successful: bool
    value: int

If you pass in data like {"successful": True} this will deserialize to a default value of 0 for value. Note, that this would not deserialize since value is not optional: {"successful": True, "value": None}.