如何合并两个具有相同键的嵌套映射并保留这些值

def merge_nested_maps(map1, map2):
    for key, value in map2.items():
        if key in map1:
            if isinstance(value, dict) and isinstance(map1[key], dict):
                merge_nested_maps(map1[key], value)
            elif isinstance(value, (list, set)) and isinstance(map1[key], (list, set)):
                map1[key].extend(value)
            else:
                map1[key] = value
        else:
            map1[key] = value

# 示例用法
map1 = {
    'key1': 'value1',
    'key2': {
        'nested_key1': 'nested_value1',
        'nested_key2': 'nested_value2'
    }
}

map2 = {
    'key1': 'new_value1',
    'key2': {
        'nested_key2': 'new_nested_value2',
        'nested_key3': 'nested_value3'
    },
    'key3': 'value3'
}

merge_nested_maps(map1, map2)
print(map1)

{
    'key1': 'new_value1',
    'key2': {
        'nested_key1': 'nested_value1',
        'nested_key2': 'new_nested_value2',
        'nested_key3': 'nested_value3'
    },
    'key3': 'value3'
}