在python 3中高效地循环遍历嵌套字典的方法

def iterate_nested_dict(nested_dict):
    for key, value in nested_dict.items():
        if isinstance(value, dict):
            iterate_nested_dict(value)
        else:
            # 在这里处理每个键值对
            print(key, value)

nested_dict = {
    'key1': 'value1',
    'key2': {
        'nested_key1': 'nested_value1',
        'nested_key2': 'nested_value2'
    },
    'key3': 'value3'
}

iterate_nested_dict(nested_dict)

def iterate_nested_dict(nested_dict):
    stack = [(nested_dict, '')]
    while stack:
        current_dict, prefix = stack.pop()
        for key, value in current_dict.items():
            if isinstance(value, dict):
                stack.append((value, prefix + key + '.'))
            else:
                # 在这里处理每个键值对
                print(prefix + key, value)

nested_dict = {
    'key1': 'value1',
    'key2': {
        'nested_key1': 'nested_value1',
        'nested_key2': 'nested_value2'
    },
    'key3': 'value3'
}

iterate_nested_dict(nested_dict)