查询Python字典从元组获取值

查询Python字典从元组获取值

本文介绍了查询Python字典从元组获取值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

假设我有一个Python字典,但值是一个元组:



例如。

  dict = {Key1:(ValX1,ValY1,ValZ1),Key2:(ValX2,ValY2,ValZ2) ,...,Key99:(ValX99,ValY99,ValY99)} 

仅从元组中检索第三个值,例如。 ValZ1,ValZ2或ValZ99。



我可以使用 .iteritems()例如:

  for key,val in dict.iteritems():
ValZ = val [2]

然而,是否有更直接的方法?



理想情况下,我想按键查询字典,只返回元组中的第三个值...



eg



dict [Key1] = ValZ1 而不是我目前得到的,这是 dict [Key1] =(ValX1,ValY1,ValZ1)不可调用...



任何建议?

解决方案

只要保持索引:

 >> > D = {Key1:(1,2,3),Key2:(4,5,6)} 
>>> D [Key2] [2]
6


Let's say that I have a Python dictionary, but the values are a tuple:

E.g.

dict = {"Key1": (ValX1, ValY1, ValZ1), "Key2": (ValX2, ValY2, ValZ2),...,"Key99": (ValX99, ValY99, ValY99)}

and I want to retrieve only the third value from the tuple, eg. ValZ1, ValZ2, or ValZ99 from the example above.

I could do so using .iteritems(), for instance as:

for key, val in dict.iteritems():
       ValZ = val[2]

however, is there a more direct approach?

Ideally, I'd like to query the dictionary by key and return only the third value in the tuple...

e.g.

dict[Key1] = ValZ1 instead of what I currently get, which is dict[Key1] = (ValX1, ValY1, ValZ1) which is not callable...

Any advice?

解决方案

Just keep indexing:

>>> D = {"Key1": (1,2,3), "Key2": (4,5,6)}
>>> D["Key2"][2]
6

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08-15 22:33