小编Yeo*_*Jin的帖子

我想知道如何在单击按钮后更改标签文本。例如：

from Tkinter import *
import tkMessageBox

def onclick():
    pass

root = Tk()

root.title("Pantai Hospital")

L1 = Label(root, text='Welcome to Pantai Hospital!')
L1.pack() 
L2 = Label(root, text='Login')
L2.pack() 

L3 = Label(root, text = "Username:")
L3.pack( side = LEFT, padx = 5, pady = 10)
username = StringVar()
E1 = Entry(root, textvariable = username, width = 40)
E1.pack ( side = LEFT)

L4 = Label(root, text = "Password:")
L4.pack( side = LEFT, padx = 5, pady = 10)
password = StringVar() …