update bonus doc

test/ojtest.py

@@ -0,0 +1,20 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+
+import os
+import sys
+import time
+import json
+import subprocess
+import re
+import shutil
+import random
+import string
+import hashlib
+import threading
+
+# first, get the directory of the script
+script_dir = os.path.dirname(os.path.realpath(__file__))
+print("script_dir: " + script_dir)
+path_to_exec_file = os.path.join(script_dir, "../build/code")
+print("path_to_exec_file: " + path_to_exec_file)