Pythonic方法迭代字典中的列表并行作为一个字典(Pythonic way to iterate over lists inside a dict in parallel AS a dict)

 我意识到这个问题的标题可能不会立即超级明确，所以在一个例子中： 
 我的dict包含如下列表（假设其中没有其他内容）： 
 
packed = {
    'names': ['a', 'b', 'c', 'd'],
    'values': ['A', 'B', 'C', 'D']
}
 
 我想要做的是并行迭代每个列表（尽可能多的列表），但是在每次迭代中我都有一个带有每个列表的单个元素的dict 。 我想象这样的事情： 
 
for pack in smartIterate(packed): #how to "smartIterate"?
    print(pack['names'], pack['values'])
    #pack is equal to {'names':'a', 'values':'A'} in the first iteration
 
 打印出来： 
 
a, A
b, B
c, C
d, D
 
 我意识到这可以通过显式迭代一个子列表的长度并在每次迭代期间构造一个dict来完成： 
 
for i in range(len(packed.values()[0])):
    pack = dict(zip(packed.keys(),[v[i] for v in packed.values()]))
 
 但感觉有一种更清洁，更有效 - pythonic - 的方式来做到这一点。 
 
 类似的问题： 
 
 
 
 这并没有明确涉及迭代字典中包含的列表 - 我的具体是关于它， 
 
 
 这不涉及dict中的并行列表， 
 
 
 这不涉及dicts。 
 

I realize that the title of this question might not be immediately super clear, so on an example:
 My dict contains lists as follows (assume there's nothing else in it):
 
packed = {
    'names': ['a', 'b', 'c', 'd'],
    'values': ['A', 'B', 'C', 'D']
}
 
What I want to do is to iterate over each of these lists (as many as there might be) in parallel, but so that during each iteration I have a dict with a single element of each list. I imagine something like this:
 
for pack in smartIterate(packed): #how to "smartIterate"?
    print(pack['names'], pack['values'])
    #pack is equal to {'names':'a', 'values':'A'} in the first iteration
 
printing out that:
 
a, A
b, B
c, C
d, D
 
I realize this can be done with explicitly iterating over the length of one sublist and constructing a dict during each iteration:
 
for i in range(len(packed.values()[0])):
    pack = dict(zip(packed.keys(),[v[i] for v in packed.values()]))
 
but it feels like there is a cleaner, more efficient - pythonic - way to do that.
 
Similar questions:
 
 
 
this didn't clearly involve iterating over lists contained within a dict - mine is specifically about it,
 
 
this didn't involve parallel lists within a dict,
 
 
this didn't involve dicts.
 

原文：https://stackoverflow.com/questions/50874572