Simplify on_stop

pipe_io_server/pipe_io_server.py

@@ -1,5 +1,4 @@
 from threading import Thread, Event
-from typing import Callable
 
 from .pipe_reader_thread import PipeReaderThread
 from .pipe_writer_thread import PipeWriterThread
@@ -13,7 +12,6 @@ class PipeIOServer(Thread):
         self._in_pipe, self._out_pipe = in_pipe, out_pipe
         self._create_pipes(permissions)
         self._stop_event = Event()
-        self._on_stop = lambda: None
         self._reader_thread, self._writer_thread = None, None
         self._io_threads = None
 
@@ -66,14 +64,10 @@ class PipeIOServer(Thread):
                 thread.stop()
         Pipe(self.in_pipe).remove()
         Pipe(self.out_pipe).remove()
-        self._on_stop()
+        self.on_stop()
 
-    def _set_on_stop(self, value):
-        if not isinstance(value, Callable):
-            raise ValueError("Supplied object is not callable!")
-        self._on_stop = value
-
-    on_stop = property(fset=_set_on_stop)
+    def on_stop(self):
+        pass
 
     def wait(self):
         self._stop_event.wait()