app.add_url_rule('/tool_2/', 'tool2', view_func=tool_2_view)
app.add_url_rule('/tool_2/<option>', 'tool2', view_func=tool_2_view)
app.add_url_rule('/tool_2/<option>/<filter>', 'tool2', view_func=tool_2_view)
Adding REST behavior to a class with flask, case for blueprints?