add accessor to emitters created by observer

src/watchdog/observers/api.py

@@ -245,6 +245,11 @@ def _add_handler_for_watch(self, event_handler, watch):
     def _remove_handlers_for_watch(self, watch):
         del self._handlers[watch]
 
+    @property
+    def emitters(self):
+        """Returns event emitter created by this observer."""
+        return self._emitters
+
     def start(self):
         for emitter in self._emitters:
             emitter.start()

tests/test_observer.py

@@ -36,27 +36,27 @@ def finalizer():
 def test_schedule_should_start_emitter_if_running(observer):
     observer.start()
     observer.schedule(None, '')
-    (emitter,) = observer._emitters
+    (emitter,) = observer.emitters
     assert emitter.is_alive()
 
 
 def test_schedule_should_not_start_emitter_if_not_running(observer):
     observer.schedule(None, '')
-    (emitter,) = observer._emitters
+    (emitter,) = observer.emitters
     assert not emitter.is_alive()
 
 
 def test_start_should_start_emitter(observer):
     observer.schedule(None, '')
     observer.start()
-    (emitter,) = observer._emitters
+    (emitter,) = observer.emitters
     assert emitter.is_alive()
 
 
 def test_stop_should_stop_emitter(observer):
     observer.schedule(None, '')
     observer.start()
-    (emitter,) = observer._emitters
+    (emitter,) = observer.emitters
     assert emitter.is_alive()
     observer.stop()
     observer.join()