Add yf_selected_expiration

app.py

@@ -195,7 +195,7 @@ with open("prompts.yaml", 'r') as stream:
     
 agent = CodeAgent(
     model=model,
-    tools=[final_answer, ddgs, yf_underlying_price, yf_atm_strike, yf_atm_call_price, yf_atm_put_price, yf_atm_call_iv, yf_atm_put_iv, yf_atm_straddle_price], ## add your tools here (don't remove final answer)
+    tools=[final_answer, ddgs, yf_underlying_price, yf_selected_expiration, yf_atm_strike, yf_atm_cal_price, yf_atm_put_price, yf_atm_call_iv, yf_atm_put_iv, yf_atm_straddle_price], ## add your tools here (don't remove final answer)
     max_steps=6,
     verbosity_level=1,
     grammar=None,