TKInter无法更改字符串的值

Question

我有这个python2.7.9代码。错误在于chooseKid()函数。StringVarcurrent和标签chosenKid不更新。我已经验证了chooseKid()确实运行，并且choice变量已设置。但是chosenKid

from Tkinter import Tk,Button,StringVar,Entry,Label
import random

root= Tk()

current=StringVar()
kids=[]

addKidName=Entry(root)
def addkid():
    kids.append(addKidName.get())
    print kids
addKid=Button(root, text="Add a student", command=addkid)


def choosekid():
    chosen=random.choice(kids)
    current.set(chosen)
chooseKid=Button(root,text="Pick random student", command=choosekid)
chosenKid=Label(root,text=current)


addKid.grid(row=0,column=1)
addKidName.grid(row=0,column=0)
chooseKid.grid(row=1,column=1)
chosenKid.grid(row=1,column=0)

root.mainloop()

Answer 1

您需要设置textvariable，而不是text。这将允许Label内容与StringVar中当前的内容相匹配。在

chosenKid=Label(root, textvariable=current)