Update app.py

app.py

@@ -41,7 +41,7 @@ def network_visualizer(city, year, num_nodes):
         target = row['Student']
         attribute_value = row['Hadiths']
         edge_color = value_to_hex(attribute_value)
-        hadith_count = teacher_hadiths[teacher_hadiths['Teacher'] == source.to_list()[0]]['Hadiths'].to_list()[0]
+        hadith_count = teacher_hadiths[teacher_hadiths['Teacher'] == source]['Hadiths'].to_list()[0]
 
         net.add_node(source, color=value_to_hex(hadith_count), font = {'size':30, 'color': 'orange'})
         net.add_node(target, color=value_to_hex(attribute_value) , font = {'size': 20, 'color': 'red'})