Python - 字典

Question

我是编程和 python 的新手，我不知道如何解决这个问题。

 my_dict  = {'tiger': ['claws', 'sharp teeth', 'four legs', 'stripes'],
       'elephant': ['trunk', 'four legs', 'big ears', 'gray skin'],
       'human': ['two legs', 'funny looking ears', 'a sense of humor']
       }

new_dict = {}

for k, v in my_dict.items():
    new_v = v + "WOW"
    new_dict[k] = new_v

print(new_dict)

我想用添加的短语制作一本新词典，但我收到错误消息“只能将列表(而不是“str”)连接到列表”，但是当我每个键只使用一个值时，程序可以正常工作。有什么解决办法吗？

Answer 1

您可以将一个列表连接到另一个列表，如下所示:

if __name__ == '__main__':
    my_dict  = {'tiger': ['claws', 'sharp teeth', 'four legs', 'stripes'],
       'elephant': ['trunk', 'four legs', 'big ears', 'gray skin'],
       'human': ['two legs', 'funny looking ears', 'a sense of humor']
       }

    new_dict = {}
    
    for k, v in my_dict.items():
        new_v = v + ["WOW"]
        new_dict[k] = new_v
    
    print(new_dict)

{'tiger': ['claws', 'sharp teeth', 'four legs', 'stripes', 'WOW'], 'elephant': ['trunk', 'four legs', 'big ears', 'gray skin', 'WOW'], 'human': ['two legs', 'funny looking ears', 'a sense of humor', 'WOW']}