Take indices of non zero elements of matrix

[niksirat]

Hi,

1  0  -1
0  1   4
3  0   0

matrix build by this code:

n = int(input())  # n=3

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

I want to save (0,0) (0,2) (1,1) (1,2) (2,0), position of non zero elements, for example like this:

x =[
0 0
0 2
1 1
1 2
2 0]

 

[phillip1882]

so thats fairly straight forward.

n = int(input())
coordinate_matrix =[]
for i in range(n):
    a = []
    for j in range(n):
        a.append(int(input()))
        if a[-1] != 0:
            coordinate_matrix +=[[i,j]]
     adjacency_matrix.append(a)