make the dispatcher execte transcription jobs asynchronously

notescriber.py

@@ -1,9 +1,11 @@
 #!/usr/bin/env python
 
 from notescriber.transcriber import Transcriber
+from notescriber.dispatcher import Dispatcher
 from notescriber.picker import Picker
 
 if __name__ == '__main__':
     transcriber = Transcriber()
-    picker = Picker("/home/octopusx/Code/test", transcriber)
+    dispatcher = Dispatcher(transcriber)
+    picker = Picker("/home/octopusx/Code/test", dispatcher)
     picker.observe()

notescriber/__init__.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+from notescriber import dispatcher
 from notescriber import notetaker
 from notescriber import picker
 from notescriber import transcriber

notescriber/dispatcher.py

@@ -0,0 +1,16 @@
+import threading
+
+class Dispatcher:
+
+    threads = []
+    callbackExecutor = None
+
+    def __init__(self, callbackExecutor):
+        self.callbackExecutor = callbackExecutor
+
+    def execute(self, audio_file):
+        thread = threading.Thread(target=self._execute_thread, args=(audio_file.pathname,))
+        thread.start()
+
+    def _execute_thread(self, audio_file):
+        self.callbackExecutor.execute(audio_file)

notescriber/transcriber.py

@@ -3,4 +3,4 @@ class Transcriber:
         pass
 
     def execute(self, audio_file):
-        print("Transcribing audio file: " + audio_file.pathname)
+        print("Transcribing audio file: " + audio_file)