Two dimensional array in python

Question

I want to know how to declare a two dimensional array in Python.

arr = [[]]

arr[0].append(\"aa1\")
arr[0].append(\"aa2\")
arr[1].append(\"bb1\")
arr[1].appe         


        

Answer 1

For compititve programming

1) For input the value in an 2D-Array

row=input()
main_list=[]
for i in range(0,row):
    temp_list=map(int,raw_input().split(" "))
    main_list.append(temp_list)

2) For displaying 2D Array

for i in range(0,row):
    for j in range(0,len(main_list[0]):
        print main_list[i][j],
        print