显示了tkinter gui中i的递增。

import tkinter as tk

class IncrementApp:
    def __init__(self, root):
        self.root = root
        self.root.title("Increment Counter")
        
        self.counter = 0
        
        self.label = tk.Label(root, text=str(self.counter), font=("Arial", 48))
        self.label.pack(pady=20)
        
        self.button = tk.Button(root, text="Increment", command=self.increment_counter)
        self.button.pack(pady=20)
    
    def increment_counter(self):
        self.counter += 1
        self.label.config(text=str(self.counter))

if __name__ == "__main__":
    root = tk.Tk()
    app = IncrementApp(root)
    root.mainloop()