Flatten [{"data": foo}] to foo

juniper_data_list_strip.py

import json

def flatten_data(pairs):
    for i, (k, v) in enumerate(pairs):
        if not isinstance(v, list) or len(v) != 1 or not isinstance(v[0], dict):
            continue

        kk, vv = next(iter(v[0].items()))
        if kk == "data":
            pairs[i] = (k, vv)

    return dict(pairs)

with open("data.json", "r")  as fd:
    d = json.load(fd, object_pairs_hook=flatten_data)