1 121 12321 triangle in python

1row = int(input('Enter how many lines? '))
2
3# Generating pattern
4for i in range(1,row+1):
5    
6    # for space
7    for j in range(1, row+1-i):
8        print(' ', end='')
9    
10    # for increasing pattern
11    for j in range(1,i+1):
12        print(j, end='')
13    
14    # for decreasing pattern 
15    for j in range(i-1,0,-1):
16        print(j, end='')
17    
18    # Moving to next line
19    print()