计算两个列表中每个元素之间的差异(Calulate the differences between each element of two lists)

 我想计算另一个列表中每个元素的列表中每个条目的差异。 考虑两个列表A和B. 
 
A = [1,2,3,4] B=[5,6,7]
 
 一个新的列表c应该有12个条目 
 
C=[1-5,1-6,1-7,2-5,2-6,2-7,....,4-7]
C=[-4,-5,-6,-3,-4,-5,....,-3]
 
 当然这可以用循环来实现，但是有更快更有效的方法吗？ 我的名单A和B的尺寸为8000和2500，我必须连续做150次。 非常感谢你提前！ 

I would like to calculate the difference of each entry of a list from each element of another list. Considering two lists A and B
 
A = [1,2,3,4] B=[5,6,7]
 
a new list c should have 12 entries
 
C=[1-5,1-6,1-7,2-5,2-6,2-7,....,4-7]
C=[-4,-5,-6,-3,-4,-5,....,-3]
 
Of course this is possible with loops, but is there a faster and more efficient way? My lists A and B have the dimensions 8000 and 2500, and I have to do it about 150 times in a row. Thank you very much in advance!

原文：https://stackoverflow.com/questions/47876461