Matrix = {}
Matrix[(2,3,4)] = 88
Matrix[(7,8,9)] = 99
X = 2; Y = 3; Z = 4 # ; separates statements
print Matrix[(X,Y,Z)]
print Matrix
if Matrix.has_key((2,3,6)): # check for key before fetch
print Matrix[(2,3,6)]
else:
print 0