Rotate Matrix (LC-0048)

class Solution:
    def rotate(self, matrix):
		m = matrix
        for ix in range(1):
            nR = len(matrix)
            nC = len(matrix[0])
            for rx in range(nR):
                for cx in range(rx, nC, 1):
                    m[rx][cx], m[cx][rx] = m[cx][rx], m[rx][cx]
            for row in matrix:
                row.reverse()