from typing import List


def is_json(data: List[dict]):
    """Shorthand assertion for a json data structure"""
    is_list = isinstance(data, list)

    is_list_of_dicts = True
    for record in data:
        if not isinstance(record, dict):
            is_list_of_dicts = False
            break

    return is_list and is_list_of_dicts