Update app.py

app.py

@@ -19,9 +19,14 @@ SPEAKER_DICT = {}
 SPEAKERS = []
 
 def GetSpeaker(sp):
+    speaker = sp
     if sp not in list(SPEAKER_DICT.keys):
-        SPEAKER_DICT[sp] = SPEAKERS.pop(0)
-    return SPEAKER_DICT[sp]
+        if len(SPEAKERS):
+            SPEAKER_DICT[sp] = SPEAKERS.pop(0)
+            speaker = SPEAKER_DICT[sp]
+    else:
+        speaker = SPEAKER_DICT[sp]
+    return speaker
 
 def GenerateSpeakerDict(sp):
     SPEAKERS = [speaker.strip() for speaker in sp.split(',')]