JSON Value Type Consistency | Dataford Interview Questions

Your question is JSON Value Type Consistency. Start with the requirements on the right.

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Problem

Quizlet content services exchange collections of JSON objects for surfaces such as Quizlet Study Sets. Given a list of objects and a key, determine whether every object contains that key with the same JSON value type.

The JSON type categories are null, boolean, number, string, array, and object. Treat all numeric values as the number type, and ensure booleans are not classified as numbers. If any object is missing the key, return False. An empty input list is valid and returns True.

Formal Specification

Implement verify_json_key_types(objects, key).

objects is a list of JSON objects represented as Python dictionaries.
key is a non-empty string.
Return a boolean indicating whether every object contains key and all corresponding values have the same JSON type.
Only the top-level type of the value associated with key matters. Nested contents do not need to match.

Constraints

1 <= len(objects) <= 10^5
Each object contains at most 10^3 key-value pairs
Values are valid JSON values
The requested key may be absent from an object
All numbers use the single JSON type category number

Function Signature

def verify_json_key_types(objects, key):