的Python：配對的每一個元素的單一元素列表中的

Question

例如： myStr = 'z'是與myList = ['a','b','c']配對，使得輸出如下：

['z','a'] 
['z','b'] 
['z','c'] 

一個班輪將是巨大的！

我試着這樣做：

print zip([myStr, x] for x in myList) 

但產量並不像我想，在這裏：

[(['z', 'a'],), (['z', 'b'],), (['z', 'c'],)] 

Answer 1

試試這個：

myList = ['a','b','c'] 
myStr = 'z' 
res = [[myStr, x] for x in myList] 

Answer 2

Itertools- izip-longest

>>>from itertools import izip_longest 
>>>[list(i) for i in list(izip_longest(['z'],['a','b','c'],fillvalue ='z'))] 
>>>[['z', 'a'], ['z', 'b'], ['z', 'c']] 

Answer 3

from itertools import izip_longest 
list(izip_longest([], ['a','b','c'], fillvalue='z')) 

Answer 4

隨着zip：

>>> zip(myStr*3,myList) 
[('z', 'a'), ('z', 'b'), ('z', 'c')]