How to input matrix (2D list) in Python?

Question

I tried to create this code to input an m by n matrix. I intended to input [[1,2,3],[4,5,6]] but the code yields [[4,5,6],[4,5,6]. Same things happ

Answer 1

m,n=map(int,input().split()) # m - number of rows; n - number of columns;

matrix = [[int(j) for j in input().split()[:n]] for i in range(m)]

for i in matrix:print(i)