code: def ncpos(string, chars, start):
      
      string = stypes.stringToCharP(string)
      chars = stypes.stringToCharP(chars)
      start = ctypes.c_int(start)
      return libspice.ncpos_c(string, chars, start)
docs: Find the first occurrence in a string of a character NOT belonging
      to a collection of characters, starting at a specified
      location searching forward.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/ncpos_c.html
  
      :param string: Any character string.
      :type string: str
      :param chars: A collection of characters.
      :type chars: str
      :param start: Position to begin looking for one not in chars.
      :type start: int
      :return: index
      :rtype: int