In class we discussed matrix representations as: 

  a) strings

  b) nested lists

  c) dictionaries

In lab we will work with representations (b) and (c) and implement the magic square problem. 

The example used in class: 


   +---+---+---+
   | * |   | * |
   +---+---+---+
   |   | * |   |
   +---+---+---+
   | * |   | * |
   +---+---+---+

As a string this could be:

   s = "* *\n * \n* *\n"

With nested lists this can be: 

   m = [['*', ' ', '*'], [' ', '*', ' '], ['*', ' ', '*']]

With dictionaries it would be: 

   d = ( (0, 0) : '*', (0, 1) : ' ', ... , (2, 2) : '*', 'rows' : 3, 'columns' : 3 )

Code was written to access, modify and print these structures. 

I will write it here after lab.