Update app.py

app.py

@@ -75,10 +75,23 @@ unique_country_names = sorted(country_name_mapping.keys())  # List of country na
 # Layout filters in columns
 col1, col2, col3 = st.columns([1, 1, 4])
 
+# Region filter
 with col1:
     region_filter = st.selectbox("Region", ["All/Not allocated"] + sorted(unique_sub_regions))  # Display region names
+
+# Dynamically filter countries based on selected region
+if region_filter == "All/Not allocated":
+    filtered_country_names = unique_country_names  # Show all countries if no region is selected
+else:
+    filtered_country_names = [
+        name for name, code in country_name_mapping.items() if iso_code_to_sub_region.get(code) == region_filter
+    ]
+
+# Country filter
 with col2:
-    country_filter = st.selectbox("Country", ["All/Not allocated"] + unique_country_names)  # Display country names
+    country_filter = st.selectbox("Country", ["All/Not allocated"] + filtered_country_names)  # Display filtered country names
+
+# Year range slider
 with col3:
     current_year = datetime.now().year
     default_start_year = current_year - 5  # Default to 5 years ago
@@ -128,7 +141,6 @@ def filter_results(results, country_filter, region_filter, end_year_range):
 
 if button:
     # 1) Use a bigger limit so we get more than 10 results
-    #    We'll filter them first, then slice the top 10 from the filtered set.
     results = hybrid_search(client, var, collection_name, limit=300)  # e.g., 100 or 200
 
     # results is a tuple: (semantic_results, lexical_results)