Update main.py

main.py

@@ -4,4 +4,24 @@ app = FastAPI()
 
 @app.get("/")
 def read_root():
-    return {"Hello": "langchain {}".format(langchain.__version__)}
+    run_something()
+    return {"Hello": "langchain {}".format(langchain.__version__)}
+
+from langchain.llms.fake import FakeListLLM
+
+from langchain.agents import load_tools
+from langchain.agents import initialize_agent
+from langchain.agents import AgentType
+
+def run_something()
+    tools = load_tools(["python_repl"])
+    responses = ["Action: Python REPL\nAction Input: print(2 + 2)", "Final Answer: 4"]
+    llm = FakeListLLM(responses=responses)
+    
+    agent = initialize_agent(
+        tools, llm, agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION, verbose=True
+    )
+    agent.run("whats 2 + 2")
+
+
+