PYTHON

sum of column in 2d array python

col_totals = [sum(x) for x in zip(*my_list)]

how to add elements in 2d array in python

n,m=int(input()),int(input())
   for i in range(0,n):
      for j in range(0,m):
         a[i].append(int(input()))

get sum of 2d array python

>>> b=np.sum(x)
   print(b)
21

sum 2d array in python

#create 2D array Matrix 4X4
Matrix = [[0 for i in range(4)] for j in range(4)]
#2D array python 
 x=[[11, 12,13],[14, 15,16],[17, 18,19]]                                                   
sum(sum(x,[]))  

calculate sum in 2d list python

 >>> x=[[1, 2],[3, 4],[5, 6]]                                                   
>>> sum(sum(x,[]))                                                             
21