For JSON there is the `jmespath` library which might help.

https://github.com/jmespath/jmespath.py

    print(jmespath.search(
        expression="some.deep.nested.value",
        data={"some": {"deep": {"nested": {"value": 2}}}},
    ))
    prints 2

    print(jmespath.search(
        expression="some.deep.nested.value2",
        data={"some": {"deep": {"nested": {"value": 2}}}},
    ))
    prints None