0

这是我的代码:

import sys
from tkinter import *


#first new screen
def hypoténusegetdef ():
    widgets1 = button1
    nextscreen1(widgets1)

def next_screen1(names):
    for widget in names:
        widget.place_forget() 
        hyplabel1 = Label (text = "This is my text")



def next_screen(names):
    for widget in names:
        widget.place_forget()
        button1 = Button (text = "Button1",fg = "blue",command = hypoténusegetdef)
        button1.grid (row = 1,column = 2)


def forget_page1():
    widgets = [mLabel1, button]
    next_screen(widgets)

################################################################################

#first page things
mGui = Tk ()

mGui.geometry("600x600+545+170")
mGui.title("MyMathDictionary")
mLabel1 = Label (text = "Welcome to MyMathDictionary. Press Next to continue.",
                 fg = "blue",bg = "white")
mLabel1.place (x= 150,y = 200)

button = Button (text = "Next", command = forget_page1 )
button.place(x = 275,y = 230)

mGui.mainloop()

我希望用户单击“下一步”,然后在单击该按钮后出现一个名为“button1”的按钮,文本应该出现“这是我的文本”,但它给了我一个错误:

Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python33\lib\tkinter\__init__.py", line 1475, in __call__
return self.func(*args)
File "C:\Python33\Projects\MyMathDictionary.py", line 7, in hypoténusegetdef
widgets1 = button1
NameError: global name 'button1' is not defined

任何帮助将不胜感激:

4

1 回答 1

1

button1 在 next_screen 中定义,但在 hypoténusegetdef 中使用——您不能在另一个函数中使用来自一个函数的变量。查看其余代码,最简单的可能是使用可以在任何地方访问的全局变量(通常是不好的做法,但对于短脚本,它们可以使事情变得更容易)

于 2013-08-12T12:46:47.207 回答