[Python] How to cleanly add a validation function to a TypedDict

I currently have a bunch of classes describing serializable data structures in python. Something like that :

class Dummy(Serializable):
def __init__(self, p_1: str, p_2: int) -> None:
self.p_1 = p_1
self.p_2 = p_2

@classmethod
def validate(cls, data: dict) -> Errors:
validator = DataModelValidator({
"p_1": data_is_type(str),
"p_2": [
data_is_type(int),
data_less_than(10)
],
}, exact=True)
return validator.validate(data)


Serializable and DataModelValidator are home-made classes used to handle and validate those structures.

I would like to attempt to use TypedDict instead, something like that :

class Dummy(TypedDict):
p_1: str
p_2: int

def validate(self) -> Errors:
validator = DataModelValidator({
"p_1": data_is_type(str),
"p_2": [
data_is_type(int),
data_less_than(10)
],
}, exact=True)
return validator.validate(data)



as I feel this would be way cleaner. This is code used for testing, and I would like to use keep the IDE's auto-completion provided by the typing.

However, I cannot attach a function to a TypedDict, as it is just a dict. I am looking for an idea to cleanly tie the dict and the validation function together.

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