Question

I am trying to build a simple board in command line.

Problem:
When i use “\n” for ending current line, it adds an extra blank line. How can i fix that?

Code:

def drawBoard():
    board = [ [0,0,0,0,0,0,0,0,0],
              [0,0,0,0,0,0,0,0,0],
              [0,0,0,0,0,0,0,0,0],
              [0,0,0,0,3,2,1,0,0],
              [0,0,0,0,0,0,0,0,0],
              [0,0,0,0,0,0,0,0,0],
              [0,0,0,0,0,0,0,0,0],
              [0,0,0,0,0,0,0,0,0],
              [0,0,0,0,0,0,0,0,0]
            ]
    return board

def printBoard():
    for i in drawBoard():
        for a in i:
            print a,
        print "\n"

printBoard()

Output:

0 0 0 0 0 0 0 0 0 

0 0 0 0 0 0 0 0 0 

0 0 0 0 0 0 0 0 0 

0 0 0 0 3 2 1 0 0 

0 0 0 0 0 0 0 0 0 

0 0 0 0 0 0 0 0 0 

0 0 0 0 0 0 0 0 0 

0 0 0 0 0 0 0 0 0 

0 0 0 0 0 0 0 0 0 

Thanks for your help.

Answer 1

use join(), don’t rely on the , for formatting, and also print automatically puts the cursor on a newline every time, so no need of adding another '\n' in your print.

In [24]: for x in board:
    print " ".join(map(str,x))
   ....:     
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 3 2 1 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0