如何使用tkinter创建带有lambda的0-9数字按钮？

import tkinter as tk

root = tk.Tk()

entry = tk.Entry(root)
entry.pack()

def update_text(num):
    current_text = entry.get()
    entry.delete(0, tk.END)
    entry.insert(tk.END, current_text + str(num))

for i in range(10):
    button = tk.Button(root, text=str(i), command=lambda num=i: update_text(num))
    button.pack(side=tk.LEFT)

root.mainloop()