Update app.py

app.py

@@ -7,7 +7,11 @@ openai.api_key = os.environ["api_key"]
 engine = os.environ["engine"]
 
 
-def happytt(temperature,max_tokens,text,stop): 
+def happytt(temperature,max_tokens,text,stop):
+  if stop == '':
+    stop = []
+  else:
+    stop = [stop]
   response = openai.Completion.create(
     engine=engine,
     prompt=text,
@@ -16,7 +20,7 @@ def happytt(temperature,max_tokens,text,stop):
     top_p=1,
     frequency_penalty=0,
     presence_penalty=0,
-    stop=[stop]
+    stop=stop
 )
 
   return response.choices[0].text