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gistfile1.py

matrix_list = [[1,2,3],[4,5,6],[7,8,9]]

def lrange(seq):
    '''returns a generator for the range of a length of a matrix'''
    return range(len(seq))

def rotateMatrix(matrix_list):
    '''rotates a matrix'''

    #Constructs matrix of same size as supplied matrix
    new_matrix = [[0 for x in lrange(matrix_list[0])] for z in lrange(matrix_list)]
    
    x=0 
    for row in matrix_list:
        for y in lrange(row):
            newx,newy = rotateXY(x,y,len(matrix_list))

            new_matrix[newx][newy] = matrix_list[x][y]
        x+=1
    return new_matrix
           
def print_matrix(new_matrix):
    for line in new_matrix:
        print(line)

def rotateXY(x,y,size):
    '''takes the x y coordinate of a point on matrix of size size and returns
        the new x y values of the point in a tuple.'''
    return (y, (size-1) - x)

print(rotateMatrix(matrix_list))