如何访问元组字典的特定元素 [英] How to access specific element of dictionary of tuples

问题描述

我想访问元组字典中元组的特定元素.假设我有一个具有唯一键的字典，以及每个键具有三个值的元组.我想编写一个迭代器，为字典中的每个元素打印元组中的每三个项目.

I want to access a specific element of a tuple in a dictionary of tuples. Let's say that I have a dictionary with a unique key, and a tuple with three values, for each key. I want to write a iterator the prints every third item in a tuple for every element in the dictionary.

例如

dict = {"abc":(1,2,3), "bcd":(2,3,4), "cde", (3,4,5)}

for item in dict:
    print item[2]

但这又回来了

c
d
e

我要去哪里错了?

推荐答案

for item in dict:
    print dict[item][2]

此外，您不应以内置名称命名，因此应将字典命名为'd'或'dict'

Also, you should not name anything after a built-in, so name your dictionary 'd' or something other than 'dict'

for item in dict:与for item in dict.keys()的作用相同.

或者，您可以执行以下操作:

Alternatively, you can do:

for item in dict.values():
    print item[2]

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