parameters: (self)
docstring: Return a file descriptor (Unix) or handle (Windows) suitable for
          waiting for process termination.
docstring_summary: Return a file descriptor (Unix) or handle (Windows) suitable for
          waiting for process termination.
docstring_tokens: Return a file descriptor ( Unix ) or handle ( Windows ) suitable for waiting for process termination .
function: def sentinel(self):
          '''
          Return a file descriptor (Unix) or handle (Windows) suitable for
          waiting for process termination.
          '''
          self._check_closed()
          try:
              return self._sentinel
          except AttributeError:
              raise ValueError("process not started") from None
function_tokens: def sentinel ( self ) : self . _check_closed ( ) try : return self . _sentinel except AttributeError : raise ValueError ( "process not started" ) from None