Print number pyramid in python

Output should be:

Enter the number of rows:5

1  

1  2  

1  2  3  

1  2  3  4  

1  2  3  4  5  

Code: 

row = int(raw_input("Enter the number of rows:"))  # taking input

for i in range (1,row+1):                                             # iterating from 1 to row+1 

    for j in range(i):                                                      # iterating from 0 to i

        print "%d " % (j + 1),                                         # printing value of j in each loop

    print "\n",