Update app.py

app.py

@@ -102,19 +102,20 @@ if viz_type == "Complaints Over Time":
 #         key=f"block_select_{viz_type}"  # Unique key for each visualization
 #     )
 
-# Dropdown for Housing Block (only show for relevant visualizations)
-selected_block = 'All Blocks'  # Default value
 if viz_type in [
     "Complaints by Housing Block and Type", 
     "Complaints by Housing Block and Type (Incorporating Suggestions Based on Professor's Feedback)"
 ]:
     block_options = ['All Blocks'] + sorted(data['Housing Block'].unique().tolist())
+    # Unique key for each viz_type
+    block_key = f"block_select_{viz_type.replace(' ', '_')}"
     selected_block = st.sidebar.selectbox(
         "Select Housing Block", 
         options=block_options, 
-        key="block_select"
+        key=block_key
     )
-
+else:
+    selected_block = 'All Blocks'
     
 # # Ensuring selected_block is only used if defined
 # if viz_type in ["Complaints by Housing Block and Type", "Complaints by Housing Block and Type (Incorporating Suggestions Based on Professor's Feedback)"] and 'selected_block' not in locals():