嗨，我正在尝试使用 python 在 Spyder 中构建一个简单的计算器（只是添加）。 如何定义 end 以便删除以前的数字？

Question

import tkinter as tk

root = tk.Tk()

root.title("Simple Calculator")

e= tk.Entry(root,width=35, borderwidth=5)
e.grid(row=0,column=0, columnspan=3, padx=10, pady=10)

#define button_click
def button_click(number):
   
         e.delete(0,END) 
   
         e.insert(0,number)
    
#Define Buttons

button_1 = tk.Button(root, text="1", padx=40, pady=20, command= lambda: button_click(1))

button_2 = tk.Button(root, text="2", padx=40, pady=20, command= lambda: button_click(2))

button_3 = tk.Button(root, text="3", padx=40, pady=20, command=lambda: button_click(3))

button_4 = tk.Button(root, text="4", padx=40, pady=20, command=lambda: button_click(4))

button_5 = tk.Button(root, text="5", padx=40, pady=20, command=lambda: button_click(5))

button_6 = tk.Button(root, text="6", padx=40, pady=20, command=lambda: button_click(6))

button_7 = tk.Button(root, text="7", padx=40, pady=20, command=lambda: button_click(7))

button_8 = tk.Button(root, text="8", padx=40, pady=20, command=lambda: button_click(8))

button_9 = tk.Button(root, text="9", padx=40, pady=20, command=lambda: button_click(9))

button_0 = tk.Button(root, text="0", padx=40, pady=20, command=lambda: button_click(0))

button_add = tk.Button(root, text="+", padx=39, pady=20, command=lambda: button_click())

button_equal = tk.Button(root, text="=", padx=91, pady=20, command=lambda: button_click())

button_clear = tk.Button(root, text="Clear", padx=79, pady=20, command=lambda: button_click())

# Put the buttons on the screen

button_1.grid(row=3, column=0)

button_2.grid(row=3, column=1)

button_3.grid(row=3, column=2)

button_4.grid(row=2, column=0)

button_5.grid(row=2, column=1)

button_6.grid(row=2, column=2)

button_7.grid(row=1, column=0)

button_8.grid(row=1, column=1)

button_9.grid(row=1, column=2)

button_0.grid(row=4, column=0)

button_clear.grid(row=4, column=1, columnspan=2)

button_add.grid(row=5, column=0)

button_equal.grid(row=5, column=1, columnspan=2)

root.mainloop()

Answer 1

简单地

def button_click(number):
         e.delete(0, tk.END)  # tk.END instead of END
         e.insert(0,number)

这是因为你用过

import tkinter as tk

这意味着 tkinter 中的所有函数都存储在tk变量中。