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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 getModulusByTime(self, bp, frameGap, masked=False, paxis='Z', outFile=None):
 r"""Calculate moduli as a function of time for convergence check It can be used to obtained elastic moduli as a function of time to check their convergence. .. note:: Elastic properties cannot be calculated using a single frame because fluctuations are required. Therefore, here time means trajectory between zero time to given time. When ``esType='BST'``, following is obtained: 1) bend-1 2) bend-2 3) stretch 4) twist 5) bend-1-bend-2 6) bend-2-stretch 7) stretch-twist 8) bend-1-stretch 9) bend-2-twist 10) bend-1-twist When ``esType='ST'``, following is obtained: 1) stretch 2) twist 3) stretch-twist .. currentmodule:: dnaMD Parameters bp : list List of two base-steps forming the DNA segment. For example: with ``bp=[5, 50]``, 5-50 base-step segment will be considered. frameGap : int How many frames to skip for next calculation. this option will determine the time-gap between each calculation. Lower the number, slower will be the calculation. masked : bool ``Default=False``. To skip specific frames/snapshots. ``DNA.mask`` array should be set to use this functionality. This array contains boolean (either ``True`` or ``False``) value for each frame to mask the frames. Presently, mask array is automatically generated during :meth:`dnaMD.DNA.generate_smooth_axis` to skip those frames where 3D fitting curve was not successful within the given criteria. paxis : str Axis parallel to global helical-axis(``'X'``, or ``'Y'`` or ``'Z'``). Only require when bending motions are included in the calculation. outFile : str Output file in csv format. Returns ------- time : numpy.ndarray 1D array containing time values of shape (nframes). Elasticities : OrderedDict A ordered dictionary of 1D arrays of shape (nframes). The keys in dictionary are name of the elasticity in the same order as listed above. e.g. ``Elasticities['stretch']`` will give elasticity along stretching as a function of time. """


        if self.esType == 'BST':
            props_name = [ 'bend-1', 'bend-2', 'stretch', 'twist', 'bend-1-bend-2',
                           'bend-2-stretch', 'stretch-twist', 'bend-1-stretch',
                           'bend-2-twist', 'bend-1-twist']
        else:
            props_name = ['stretch', 'twist', 'stretch-twist']

        time, elasticity = [], OrderedDict()
        for name in props_name:
            elasticity[name] = []

        length = len(self.dna.time[:])
        for i in range(frameGap, length, frameGap):

            props = None
            if self.esType == 'BST':
                mean, modulus_t = self.getStretchTwistBendModulus(bp, frames=[0, i], paxis=paxis, masked=True)
            else:
                mean, modulus_t = self.getStretchTwistModulus(bp, frames=[0, i], masked=masked)

            modulus_t = matrixToVector(modulus_t)
            for p in range(len(props_name)):
                elasticity[props_name[p]].append(modulus_t[p])
            time.append(self.dna.time[i])

        # Write output file
        if outFile is not None:
            with open(outFile, 'w') as fout:
                fout.write('#Time')
                for name in props_name:
                    fout.write(', {0}'.format(name))
                fout.write('\n')
                for t in range(len(time)):
                    fout.write('{0:.3f}'.format(time[t]))
                    for name in props_name:
                        fout.write(', {0:.5f}'.format(elasticity[name][t]))
                    fout.write('\n')

        return time, elasticity