convert python object recursively to dict

to_dict.py

def obj_to_dict(obj):
    if type(obj) is dict:
        res = {}
        for k, v in obj.items():
            res[k] = obj_to_dict(v)
        return res
    elif type(obj) is list:
        return [obj_to_dict(item) for item in obj]
    elif type(obj) is SimpleNamespace:
        return obj_to_dict(vars(obj))
    else:
        return obj