Surely not most straigt forward thing but I got just curious.
If you got confused:
Do transform Map(None way
Undo it zip(* way
Filter Nones by map filter with lambda function for standard parameter None

vegaseat:

In python2.6 zip(*matrix) seem to work without list i.e list(zip(*matrix))==zip(*matrix)

Look, if you want a new function, and you're sure that it'll always be a 3x3 matrix, think about what you need to do. Outline it. Do it by hand a few times, and then list EVERY step needed to do it. Then translate it into the python code. So let me show you something:

# Our 3x3 matrix
matrix = \
[
[1, 2, 3],
[4, 5, 6],
[7, 8, 9],
]
# What we want it as:
new_matrix = \
[
[1, 4, 7],
[2, 5, 8],
[3, 6, 9]
]
# What steps do we need?
# If we take a look at the number placements, we get this:
# matrix[0][0] = 1
# matrix[0][1] = 2
# matrix[0][2] = 3
# matrix[1][0] = 4
# matrix[1][1] = 5
# matrix[1][2] = 6
# matrix[2][0] = 7
# matrix[2][1] = 8
# matrix[2][2] = 9
# We want it to look like this:
# new_matrix[0][0] = 1
# new_matrix[0][1] = 4
# new_matrix[0][2] = 7
# new_matrix[1][0] = 2
# new_matrix[1][1] = 5
# new_matrix[1][2] = 8
# new_matrix[2][0] = 3
# new_matrix[2][1] = 6
# new_matrix[2][2] = 9
# What steps can we take to make this possible?

If you need further help, don't be hesitant to ask

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