Sort a list of dictionaries in Python3 ¶

import functools


def sort_results(data):
    """
    Sort on "anno", than on "label"
    """

    def mycmp(a, b):
        if a < b:
            return -1
        elif a > b:
            return 1
        return 0

    def compare(x, y):
        if x['anno'] == y['anno']:
            return mycmp(x['label'], y['label'])
        return mycmp(x['anno'], y['anno'])

    data.sort(key=functools.cmp_to_key(compare), reverse=False)