code: def lspcn(body, et, abcorr):
      
      body = stypes.stringToCharP(body)
      et = ctypes.c_double(et)
      abcorr = stypes.stringToCharP(abcorr)
      return libspice.lspcn_c(body, et, abcorr)
docs: Compute L_s, the planetocentric longitude of the sun, as seen
      from a specified body.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/lspcn_c.html
  
      :param body: Name of central body.
      :type body: str
      :param et: Epoch in seconds past J2000 TDB.
      :type et: float
      :param abcorr: Aberration correction.
      :type abcorr: str
      :return: planetocentric longitude of the sun
      :rtype: float