How to create a graph/dictionairy?

Sorry for cross posting but i am afraid that my comment wouldn' t be noticed by anyone... After some useful tips and googling i managed to find a working part of code to find a path in a graph between two certain points. The problem is that in our case we don't have a graph but a two dimensional list... I tried to convert it to a dictionary (my example uses a dictionary for a graph) but i didn't make it... Any help will be truly appreciated...