请以json格式回答以下问题：python程序中如何实现一个简单的图形界面？
user
```json
{
  "answer": {
    "overview": "在Python中实现简单的图形界面可以使用Tkinter库。Tkinter是Python的标准GUI库，提供了一系列控件来构建图形用户界面。",
    "steps": [
      {
        "step": "1",
        "description": "导入Tkinter库",
        "code": "import tkinter as tk"
      },
      {
        "step": "2",
        "description": "创建主窗口",
        "code": "root = tk.Tk()"
      },
      {
        "step": "3",
        "description": "设置窗口标题",
        "code": "root.title('简单图形界面')"
      },
      {
        "step": "4",
        "description": "添加控件（例如按钮）",
        "code": "button = tk.Button(root, text='点击我')"
      },
      {
        "step": "5",
        "description": "布局控件",
        "code": "button.pack()"
      },
      {
        "step": "6",
        "description": "运行主循环",
        "code": "root.mainloop()"
      }
    ],
    "conclusion": "通过以上步骤，你可以使用Tkinter库在Python中实现一个简单的图形界面。"
  }
}
```
assistant