Update app.py

app.py

@@ -103,7 +103,7 @@ def load_recommender(paths, start_page=1):
     return 'Corpus Loaded.'
 
 
-def generate_text(prompt,engine):
+def generate_text(prompt, engine="mlsgpt3"):
     completions = openai.Completion.create(
         engine=engine,
         prompt=prompt,
@@ -117,7 +117,6 @@ def generate_text(prompt,engine):
 
 
 def generate_answer(question):
-    engine = os.environ('Engine')
     topn_chunks = recommender(question)
     prompt = ""
     prompt += 'search results:\n\n'
@@ -134,7 +133,7 @@ def generate_answer(question):
               "answer should be short and concise.\n\nQuery: {question}\nAnswer: "
 
     prompt += f"Query: {question}\nAnswer:"
-    answer = generate_text(prompt, engine)
+    answer = generate_text(prompt)
     return answer