Python 3.2.3 (default, Feb 20 2013, 14:44:27) 
[GCC 4.7.2] on linux2
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>> 
>>> empty_grid(1, 1)
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    empty_grid(1, 1)
  File "/home/sukaeto/good_stuff/documents/teaching/CISC106/spring-2013/examples/april25/emptygrid.py", line 2, in empty_grid
    grid = [['*'] * cols + 2]
TypeError: can only concatenate list (not "int") to list
>>> ================================ RESTART ================================
>>> 
>>> empty_grid(1, 1)
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    empty_grid(1, 1)
  File "/home/sukaeto/good_stuff/documents/teaching/CISC106/spring-2013/examples/april25/emptygrid.py", line 3, in empty_grid
    for row in rows:
TypeError: 'int' object is not iterable
>>> ================================ RESTART ================================
>>> 
>>> empty_grid(1, 1)
[['*', '*', '*'], ['*', ' ', '*'], ['*', '*', '*']]
>>> empty_grid(22, 10)
[['*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '*'], ['*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*', '*']]
>>> ================================ RESTART ================================
>>> 
>>> display_grid(empty_grid(22, 10))
************
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
************
>>> display_grid(empty_grid(22, 10))
************
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
************
>>> display_grid(empty_grid(2, 2))
****
*  *
*  *
****
>>> empty = empty_grid(22, 10)
>>> empty[20][8] = 'o'
>>> empty[20][9] = 'o'
>>> empty[21][8] = 'o'
>>> empty[21][9] = 'o;
SyntaxError: EOL while scanning string literal
>>> empty[21][9] = 'o'
>>> display_grid(empty)
************
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*          *
*       oo *
*       oo *
*          *
************
>>>