for i in range(6):

        spaces = i   #The number of spaces in the beginning of row.

        row = [j+1 for j in range(6-i)] + [(6-i-1)-j for j in range(6-i-1)]   #Add numbers into row.

        row_string = ' '.join(map(str, row))   #Convert list to string. Use map to turn ints in list to strings.

        for j in range(spaces):

                 row_string = ' ' + ' ' + row_string  

        print(row_string)