I have two lists:
我有两个清单：
A = [2, 4, 6, 8, 10]
B = [1, 3, 5, 7, 9]
How do I subtract each value in one list from the corresponding value in the other list and create a list such that:
如何从另一个列表中的相应值中减去一个列表中的每个值，并创建一个列表，以便：
C = [1, 1, 1, 1, 1]
Thanks.
谢谢。
2 个解决方案
#1
41
The easiest way is to use a list comprehension
最简单的方法是使用列表理解
C = [a - b for a, b in zip(A, B)]
or map():
或map（）：
from operator import sub
C = map(sub, A, B)
#2
8
Since you appear to be an engineering student, you'll probably want to get familiar with numpy. If you've got it installed, you can do
既然你似乎是一名工科学生，你可能想要熟悉numpy。如果你已安装它，你可以做到
>>> import numpy as np
>>> a = np.array([2,4,6,8])
>>> b = np.array([1,3,5,7])
>>> c = a-b
>>> print c
[1 1 1 1]
#1
41
The easiest way is to use a list comprehension
最简单的方法是使用列表理解
C = [a - b for a, b in zip(A, B)]
or map():
或map（）：
from operator import sub
C = map(sub, A, B)
#2
8
Since you appear to be an engineering student, you'll probably want to get familiar with numpy. If you've got it installed, you can do
既然你似乎是一名工科学生，你可能想要熟悉numpy。如果你已安装它，你可以做到
>>> import numpy as np
>>> a = np.array([2,4,6,8])
>>> b = np.array([1,3,5,7])
>>> c = a-b
>>> print c
[1 1 1 1]