Rotates N x N matrix by 90, 180, or 270 degrees without using any extra space

MatrixRotation.py

########################################################################
# Rotates N x N matrix by 90, 180, or 270 degrees without using any
# extra space.
########################################################################


#Swap elements from two sets of indicies in matrix
def swapMat(matrix, i1, j1, i2, j2):
    temp = matrix[i1][j1]
    matrix[i1][j1] = matrix[i2][j2]
    matrix[i2][j2] = temp
    
#Rotates matrix by 90 degrees
def matrix90rot(matrix):
    size = len(matrix)
    #Transpose Matrix
    for i in range(size):
        for j in range(i, size):
            swapMat(matrix, i, j, j, i)

    #Swap columns for proper positions
    for i in range(size):
        for j in range(int(size/2)):
            swapMat(matrix, i, j, i, size-1-j)

#Rotates matrix by 90, 180, or 270 degrees
def MatrixRotation(matrix, deg):
    if deg%360 == 90:
        matrix90rot(matrix)
    elif deg%360 == 180:
        matrix90rot(matrix)
        matrix90rot(matrix)
    elif deg%360 == 270:
        matrix90rot(matrix)
        matrix90rot(matrix)
        matrix90rot(matrix)

def printMat(m):
    for i in m:
        print(i)
    print(" ")
'''
m = [[1, 2, 3],
     [4, 5, 6],
    [7, 8, 9]]

n = [[1, 2, 3, 4],
     [5, 6, 7, 8],
     [9, 10, 11, 12],
     [13, 14, 15, 16]]

printMat(m)
MatrixRotation(m, 270)
printMat(m)

printMat(n)
MatrixRotation(n, 180)
printMat(n)
'''