Question

I often find myself in situations where I need to traverse and parse a semi-complex JSON structure. During the traversal, there are certain dictionary keys that are expected, and their values need to be appropriately mapped to some object (foo.__dict__).

Any remaining key/values that did not explicitly map to an object (foo.additional_attributes(**remaining)) will need to be isolated and so can be handled as miscellaneous key/value attributes.

Is there some combination of build-in functions simplifying this kind of traversal, mapping, and isolation, making it more dynamic and Pythonic?

Answer 1

You can use the pop method of dictionaries:

for key in expected_keys:
    foo.__dict__[key] = d.pop(key)
foo.additional_attributes(**d)