# your code goes here# your code goes here
print("--- AI训练常用工具 ---")         
tools = ["TensorFlow", "PyTorch", "Keras"]
print("初始工具列表:", tools)
print("当前工具数量:", len(tools))    
print("每个工具名称：")                
for t in tools:                       
    print(" -", t)
    
    print("--- AI训练常用工具 ---")         
tools = ["TensorFlow", "PyTorch", "Keras"]
print("初始工具列表:", tools)
print("当前工具数量:", len(tools))    
print("每个工具名称：")                
for t in tools:                       
    print(" -", t)      
    
    print("\n--- 添加新工具 ---")
new_tools = ["Scikit-learn", "MXNet"]
for tool in new_tools:
    if tool not in tools:
        tools.append(tool)
    else:
        print(f"工具 '{tool}' 已存在，跳过添加")
print("\n更新后的工具列表:", tools)