Use of cattr

attrcattr.py

import attr
import cattr
import json


@attr.s
class FooClass:
    x = attr.ib()
    y = attr.ib()


if __name__ == '__main__':
    bar = FooClass(x=1, y=2)
    serialized = cattr.unstructure(bar)
    json_data = json.dumps(serialized)

    print(json_data)
    
    bar2 = cattr.structure(serialized, FooClass)
    print(f'bar2={bar2}')