OpenOPC.py 文件源码

def _get_error_str(self, err):
      """Return the error string for a OPC or COM error code"""

      hr, msg, exc, arg = err

      if exc == None:
         error_str = str(msg)
      else:
         scode = exc[5]

         try:
            opc_err_str = unicode(self._opc.GetErrorString(scode)).strip('\r\n')
         except:
            opc_err_str = None

         try:
            com_err_str = unicode(pythoncom.GetScodeString(scode)).strip('\r\n')
         except:
            com_err_str = None

         # OPC error codes and COM error codes are overlapping concepts,
         # so we combine them together into a single error message.

         if opc_err_str == None and com_err_str == None:
            error_str = str(scode)
         elif opc_err_str == com_err_str:
            error_str = opc_err_str
         elif opc_err_str == None:
            error_str = com_err_str
         elif com_err_str == None:
            error_str = opc_err_str
         else:
            error_str = '%s (%s)' % (opc_err_str, com_err_str)

      return error_str