Update app.py

app.py

@@ -194,12 +194,20 @@ put_call_volume_range = st.sidebar.slider(
     step=0.1,
 )
 
+# Add expiration date filter
+expiration_dates = sorted(DF_options['expirationDate'].unique())
+selected_expiry = st.sidebar.multiselect(
+    "Select Expiration Dates",
+    options=expiration_dates,
+    default=expiration_dates[:3] # Default to first 3 dates
+)
+
 put_call_oi_range = st.sidebar.slider(
     "Put/Call OI Ratio Range", min_value=0.0, max_value=10.0, value=(0.0, 3.0), step=0.1
 )
 
 if st.sidebar.button("Filter"):
-    # Filter the dataframe with the range
+    # Filter the dataframe with the range and expiry dates
     filtered_df = DF_options[
         (DF_options["volume"] >= volume_range[0])
         & (DF_options["volume"] <= volume_range[1])
@@ -212,13 +220,15 @@ if st.sidebar.button("Filter"):
         & (DF_options["Put_Call_OI_Ratio"] <= put_call_oi_range[1])
         & (DF_options["Volume_OpenInterest_Ratio"] >= vol_oi_ratio_range[0])
         & (DF_options["Volume_OpenInterest_Ratio"] <= vol_oi_ratio_range[1])
+        & (DF_options["expirationDate"].isin(selected_expiry))
     ]
 
     st.write(f"Filtered records: {len(filtered_df)} rows")
 
     interestedColumns = [
         "contractSymbol",
-        "volume",
+        "expirationDate",
+        "volume", 
         "openInterest",
         "impliedVolatility",
         "Volume_OpenInterest_Ratio",