python如何对list求和

def list_add(a,b):

 c = []

 for i in range(len(a)):

 c.append(a[i]+b[i])

 return c

if __name__ == '__main__':

 a = [1,2,3]

 b = [2,3,4]

 c = [3,4,5]

 print(list_add(list_add(a,b),c))

import numpy as np

a = np.array([1,2,3])

b = np.array([2,3,4])

c = np.array([3,4,5])

print(a+b+c)

import numpy as np

a = [1,2,3]

b = [2,3,4]

c = [3,4,5]

print(np.sum([a,b,c], axis = 0))