print("--- AI训练常用工具 ---")          # 增加行1：打印标题
tools = ["TensorFlow", "PyTorch", "Keras"]
print("初始工具列表:", tools)
print("当前工具数量:", len(tools))       # 增加行2：打印列表长度
print("每个工具名称：")                  # 增加行3：提示下面逐项打印
for t in tools:                         # 增加行4：循环逐项打印
    print(" -", t)                      # 增加行5：打印单个工具
 
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)
 
 

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