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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 unitim(epoch, insys, outsys):
 """ Transform time from one uniform scale to another. The uniform time scales are TAI, TDT, TDB, ET, JED, JDTDB, JDTDT. http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/unitim_c.html :param epoch: An epoch to be converted. :type epoch: float :param insys: The time scale associated with the input epoch. :type insys: str :param outsys: The time scale associated with the function value. :type outsys: str :return: The float in outsys that is equivalent to the epoch on the insys time scale. :rtype: float """

    epoch = ctypes.c_double(epoch)
    insys = stypes.stringToCharP(insys)
    outsys = stypes.stringToCharP(outsys)
    return libspice.unitim_c(epoch, insys, outsys)