Update main.py

main.py

@@ -49,7 +49,7 @@ app = FastAPI()
 @app.post("/llm_on_cpu")
 async def stream(item: dict):
 
-    model = llms[item.llm]
+    model = llms[item['llm']]
     prefix=model['prefix']
     suffix=model['suffix']
     nctx =  item['nctx'] if 'nctx' in item.keys() else model['nctx']