code: def dasopr(fname):
      
      fname = stypes.stringToCharP(fname)
      handle = ctypes.c_int()
      libspice.dasopr_c(fname, ctypes.byref(handle))
      return handle.value
docs: Open a DAS file for reading.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/dasopr_c.html
  
      :param fname: Name of a DAS file to be opened.
      :type fname: str
      :return: Handle assigned to the opened DAS file.
      :rtype: int