tkinter的Entry创建的文本框，删除不了最后一个字符

加油forme

from tkinter import *
root = Tk()
frame = Frame(root)
frame.pack(padx = 10,pady = 10)

v1 = StringVar()
v2 = StringVar()
v3 = StringVar()

def test(content):
        if content.isdigit():
                return True
        else:
                return False

testCMD = root.register(test)
Entry(frame,textvariable = v1,width = 10,validate = "key",\
        validatecommand = (testCMD,'%P')).grid(row=0,column=0)

Label(frame,text="+").grid(row = 0,column = 1)

Entry(frame,textvariable = v2,width = 10,validate = "key",\
        validatecommand = (testCMD,'%P')).grid(row=0,column=2)
Label(frame,text="+").grid(row = 0,column = 3)


Entry(frame,textvariable = v3,width = 10,validate = "key",\
        validatecommand = (testCMD,'%P')).grid(row=0,column=4)

def calc():
        result = int(v1.get())+int(v2.get())
        v3.set(result)

Button(frame,text="计算结果",command = calc).grid(row=1,column=2,pady=5)
mainloop()

kaohsing

需要绑定几个键盘事件。

塔利班

空字符串能满足验证要求？

sunnyLHS

老铁,我跟你遇到了同样的问题

sunnyLHS

根据二楼的建议,我改写了一下test(),然后就可以完全清除了
def test(content):
    if content=="":
        return True
    else:
        return content.isdigit()

a315734685

from tkinter import *

root = Tk()

screen = Entry(root)
screen.pack()
screen.insert(END, 'FishC')
screen.delete(END)

mainloop()

screen.delete(END) 无效!! 什么情况?