你好，我试图建立一个简单的计算器(只是添加)在Spyder使用python.我如何定义end以便它将删除前一个数字?&l

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

简写

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

这是因为你使用了

import tkinter as tk

这意味着在tkinter内部的所有函数都存储在tk变量中。