WORKING WITH MATRICES

A two-dimensional matrix is a two-dimensional array of values. The following code block illustrates how to access different elements in a 2D matrix:

mm = [["a","b","c"],["d","e","f"],["g","h","i"]];

print 'mm:      ',mm

print 'mm[0]:   ',mm[0]

print 'mm[0][1]:',mm[0][1]

The output from the preceding code block is as follows:

mm:       [['a', 'b', 'c'], ['d', 'e', 'f'], ['g', 'h', 'i']]

mm[0]:    ['a', 'b', 'c']

mm[0][1]: b

Listing 3.9 shows the content of My2DMatrix.py that illustrates how to create and populate 2 two-dimensional matrices.

Listing 3.9: My2DMatrix.py

rows = 3

cols = 3

my2DMatrix = [[0...