code: def sce2t(sc, et):
      
      sc = ctypes.c_int(sc)
      et = ctypes.c_double(et)
      sclkdp = ctypes.c_double()
      libspice.sce2t_c(sc, et, ctypes.byref(sclkdp))
      return sclkdp.value
docs: Convert ephemeris seconds past J2000 (ET) to integral
      encoded spacecraft clock ("ticks"). For conversion to
      fractional ticks, (required for C-kernel production), see
      the routine :func:`sce2c`.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/sce2t_c.html
  
      :param sc: NAIF spacecraft ID code.
      :type sc: int
      :param et: Ephemeris time, seconds past J2000.
      :type et: float
      :return: SCLK, encoded as ticks since spacecraft clock start.
      :rtype: float