在python中按多个键对字典进行分组

from itertools import groupby

def group_dict_by_keys(dictionary, keys):
    # 将字典转换为键值对元组的列表
    items = dictionary.items()
    # 根据指定的多个键进行分组
    items = sorted(items, key=lambda x: [x[0][key] for key in keys])
    # 使用groupby函数进行分组
    grouped_dict = {k: dict(list(g)) for k, g in groupby(items, key=lambda x: [x[0][key] for key in keys])}
    return grouped_dict

# 示例字典
my_dict = {'A': {'key1': 1, 'key2': 2, 'key3': 3},
           'B': {'key1': 1, 'key2': 2, 'key3': 4},
           'C': {'key1': 2, 'key2': 2, 'key3': 3},
           'D': {'key1': 2, 'key2': 3, 'key3': 4}}

# 按照 'key1' 和 'key2' 进行分组
keys_to_group = ['key1', 'key2']
grouped_dict = group_dict_by_keys(my_dict, keys_to_group)

# 打印分组结果
for group, values in grouped_dict.items():
    print(f"Group {group}:")
    for key, value in values.items():
        print(f"Key: {key}, Value: {value}")