def mergeWithLabels(json, firstField, firstFieldLabel, secondField,
    secondFieldLabel):
    """
    merge two fields of a json into an array of { firstFieldLabel : firstFieldLabel, secondFieldLabel : secondField }
    """
    merged = []
    for i in range(0, len(json[firstField])):
        merged.append({firstFieldLabel: json[firstField][i],
            secondFieldLabel: json[secondField][i]})
    return merged
