如何找到字典值的长度 [英] How to find length of dictionary values

问题描述

我对所有这些都很新鲜，所以这可能是一个noobie的问题..但是我正在寻找字典值的长度...但是我不知道这可以做到如何。

$ b所以例如，

  d = {'key'：['hello'，'勇敢的'，'早晨'，'日落'，'形而上学'] 
  

一种我可以找到字典值的 len 或项的数量。

谢谢

解决方案

当然可以。在这种情况下，您只需执行以下操作：

  length_key = len（d ['key']）存储在`'key'` ... 
  

很难说为什么你真的想要这个，但是也许创建另一个将键映射到值的长度是有用的：

  length_dict = {key：len （value）为key，value in d.items（）} 
 length_key = length_dict ['key']＃存储在key的列表的长度... 
  

I am pretty new to all of this so this might be a noobie question.. but I am looking to find length of dictionary values... but I do not know how this can be done.

So for example,

d = {'key':['hello', 'brave', 'morning', 'sunset', 'metaphysics']}

I was wondering is there a way I can find the len or number of items of the dictionary value.

Thanks

解决方案

Sure. In this case, you'd just do:

length_key = len(d['key'])  # length of the list stored at `'key'` ...

It's hard to say why you actually want this, but, perhaps it would be useful to create another dict that maps the keys to the length of values:

length_dict = {key: len(value) for key, value in d.items()}
length_key = length_dict['key']  # length of the list stored at `'key'` ...

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