Flipping matrices problem

[ichabod801]

Are the input matrices guaranteed to be square? The problem doesn't say they are. In the d == 'h' section you are using len(m) for both the iteration over rows and the iteration over columns.

You should generally iterate over the list, not the indexes of the list, as shown here. Is there some reason you are not using list.reverse() or list[::-1] to reverse the list or sub-lists?