Find unique dict in a list in Python

unique_dict_in_list.py

import hashlib


def dict_hash(d: dict):
    """
    Hash dictionary's key and value in string as the hash value of the dict
    """
    out = hashlib.md5()
    for key, value in d.items():
        out.update(str(key).encode('utf-8'))
        out.update(str(value).encode('utf-8'))
    return out.hexdigest()


def sort_dict(item: dict):
    """
    Sort nested dict. For Python >= 3.6
    Example:
         Input: {'a': 1, 'c': 3, 'b': {'b2': 2, 'b1': 1}}
         Output: {'a': 1, 'b': {'b1': 1, 'b2': 2}, 'c': 3}
    """
    return {k: sort_dict(v) if isinstance(v, dict) else v for k, v in sorted(item.items())}


def unique_dict_in_list(l: list, reorder: bool=False) -> list:
    """
    Uniquify a list of dict
    Example:
         Input: [{'a': 1}, {'a': 1}, {'b': 2}]
         Output: [{'a': 1}, {'b': 2}]
    :param l: list of dictionaries
    :param reorder: Whether to reorder each dict recursively.
                    It would be useful when there are same dict but declared in different orders, in Python >= 3.6.
    """
    return list({dict_hash(d): d for d in (map(sort_dict, l) if reorder else l)}.values())