Update app.py

app.py

@@ -288,7 +288,7 @@ elif viz_type == "Complaints Over Time":
 elif viz_type == "Complaints by Housing Block and Type":
     st.subheader("Complaints by Housing Block and Type")
     
-    if housing_block != 'All Blocks':
+    if selected_block != 'All Blocks':
         complaint_pivot = filtered_data_time.pivot_table(
             index='Housing Block',
             columns='Type of Complaint',