python tkinter 界面上面是按钮，通过选择按钮下面切换至不同的界面，界面包含不同的按钮，通过操作按钮可以执行不同的程序，实现代码

这里是一个简单的示例代码，可以实现在 tkinter 界面中点击不同的按钮来切换不同的页面，每个页面包含不同的按钮，点击按钮可以执行不同的程序。

import tkinter as tk

class Page:
    def __init__(self, parent):
        self.frame = tk.Frame(parent)
        self.frame.pack()

class MainPage(Page):
    def __init__(self, parent):
        super().__init__(parent)
        self.button1 = tk.Button(self.frame, text="Page 1", command=lambda: parent.show_page(Page1))
        self.button1.pack()
        self.button2 = tk.Button(self.frame, text="Page 2", command=lambda: parent.show_page(Page2))
        self.button2.pack()

class Page1(Page):
    def __init__(self, parent):
        super().__init__(parent)
        self.button1 = tk.Button(self.frame, text="Run Program 1", command=self.run_program1)
        self.button1.pack()
        self.button2 = tk.Button(self.frame, text="Back", command=lambda: parent.show_page(MainPage))
        self.button2.pack()

    def run_program1(self):
        # code to run program 1
        pass

class Page2(Page):
    def __init__(self, parent):
        super().__init__(parent)
        self.button1 = tk.Button(self.frame, text="Run Program 2", command=self.run_program2)
        self.button1.pack()
        self.button2 = tk.Button(self.frame, text="Back", command=lambda: parent.show_page(MainPage))
        self.button2.pack()

    def run_program2(self):
        # code to run program 2
        pass

class App(tk.Tk):
    def __init__(self):
        super().__init__()
        self.pages = {}
        for page in (MainPage, Page1, Page2):
            self.pages[page] = page(self)
        self.show_page(MainPage)

    def show_page(self, page):
        self.pages[page].frame.tkraise()

app = App()
app.mainloop()