Update app.py

app.py

@@ -103,9 +103,9 @@ def load_recommender(paths, start_page=1):
     return 'Corpus Loaded.'
 
 
-def generate_text(prompt):
+def generate_text(prompt,engine):
     completions = openai.Completion.create(
-        engine=os.environ('Engine'),
+        engine=engine,
         prompt=prompt,
         max_tokens=512,
         n=1,
@@ -117,6 +117,7 @@ def generate_text(prompt):
 
 
 def generate_answer(question):
+    engine = os.environ('Engine')
     topn_chunks = recommender(question)
     prompt = ""
     prompt += 'search results:\n\n'
@@ -133,7 +134,7 @@ def generate_answer(question):
               "answer should be short and concise.\n\nQuery: {question}\nAnswer: "
 
     prompt += f"Query: {question}\nAnswer:"
-    answer = generate_text(prompt)
+    answer = generate_text(prompt, engine)
     return answer