Format strings not supported in 3.5.3

l2pauth.py

@@ -72,7 +72,7 @@ def finish_oauth():
 			for course in data['Data']:
 				session['moodle_courses'].append(str(course['id']))
 		else:
-			notify_admins('endpoint_exception', traceback=f"finish_oauth failed while getting moodle courses, data={str(data)}")
+			notify_admins('endpoint_exception', traceback="finish_oauth failed while getting moodle courses, data={}".format(str(data)))
 			raise
 	del session['oauthscope']
 	oauthget('token', refresh_token=token['refresh_token'], grant_type='invalidate')