如何从嵌套字典中迭代嵌套字典的“值”

def iterate_nested_dict(dictionary):
    for key, value in dictionary.items():
        if isinstance(value, dict):
            iterate_nested_dict(value)
        else:
            print(value)

nested_dict = {
    'key1': 'value1',
    'key2': {
        'key3': 'value3',
        'key4': {
            'key5': 'value5',
            'key6': 'value6'
        }
    }
}

iterate_nested_dict(nested_dict)

value1
value3
value5
value6

def iterate_nested_dict(dictionary):
    stack = [(dictionary, None)]
    while stack:
        current_dict, parent_key = stack.pop()
        for key, value in current_dict.items():
            if parent_key is not None:
                key = parent_key + '.' + key
            if isinstance(value, dict):
                stack.append((value, key))
            else:
                print(value)

nested_dict = {
    'key1': 'value1',
    'key2': {
        'key3': 'value3',
        'key4': {
            'key5': 'value5',
            'key6': 'value6'
        }
    }
}

iterate_nested_dict(nested_dict)

value1
value3
value5
value6