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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def mxm(m1, m2):
 """ Multiply two 3x3 matrices. http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/mxm_c.html :param m1: 3x3 double precision matrix. :type m1: 3x3-Element Array of floats :param m2: 3x3 double precision matrix. :type m2: 3x3-Element Array of floats :return: 3x3 double precision matrix. :rtype: 3x3-Element Array of floats """

    m1 = stypes.toDoubleMatrix(m1)
    m2 = stypes.toDoubleMatrix(m2)
    mout = stypes.emptyDoubleMatrix()
    libspice.mxm_c(m1, m2, mout)
    return stypes.cMatrixToNumpy(mout)