我正在为正在参加的课程编写一个欺凌滥用热线程序。我正在尝试在一个类中使用Tkinter stringvar。
我已经使用martineau（Tkinter: How to show pages with buttons on page?）的代码作为程序的基础，并且该部分代码运行良好，但是当我制作一个Entry小部件并将其绑定到stringvar t时，它给出了我的错误：
回溯（最近通话最近）： 文件“ main.py”，行190，在 main = MainView（根目录） init 中的文件“ main.py”，第14行 页面=页面（容器，控制器=自身） init 中的文件“ main.py”，第148行 Bulliedentry = Entry（自我，文本变量= t） NameError：名称“ t”未定义
这是我的代码：
from tkinter import *
class MainView(Frame):
def __init__(self, parent, *args, **kwargs):
super().__init__(parent, *args, **kwargs)
container = Frame(self)
container.pack(side='top', fill='both', expand=True)
# Create dictionary of page class instances.
self.pages = {}
for Page in (Home, Bullying, Abuse, Other):
page = Page(container, controller=self)
self.pages[Page.__name__] = page
page.place(in_=container, x=0, y=0, relwidth=1, relheight=1)
menubar = Menu(parent)
filemenu = Menu(menubar, tearoff=0)
filemenu.add_command(label='Home', command=self.pages['Home'].lift)
filemenu.add_command(label='Bullying', command=self.pages['Bullying'].lift)
filemenu.add_command(label='Abuse', command=self.pages['Abuse'].lift)
filemenu.add_command(label='Other', command=self.pages['Other'].lift)
filemenu.add_separator()
filemenu.add_command(label='Quit', command=exit)
menubar.add_cascade(label='Navigate', menu=filemenu)
parent.config(menu=menubar)
self.show_page('Home')
def show_page(self, page_name):
page = self.pages[page_name]
page.tkraise()
class Home(Frame):
def __init__(self, parent, controller):
super().__init__(parent)
label = Label(self, text='Welcome to the anonymous Help Hotline! '
'Please select your concern.', relief='groove')
label.grid(row=0, column=1, columnspan=3, sticky='nesw', padx=5, pady=5)
namelabel = Label(self, text = 'First Name', relief = 'groove')
bully_button = Button(self, text='Bullying',
command=lambda: controller.pages['Bullying'].lift())
bully_button.grid(row = 2, column=1, padx=5, pady=5, sticky='nsew')
abuse_button = Button(self, text='Abuse',
command=lambda: controller.pages['Abuse'].lift())
abuse_button.grid(row=2, column=2, padx=5, pady=5, sticky='nsew')
other_button = Button(self, text='Other',
command=lambda: controller.pages['Other'].lift())
other_button.grid(row=2, column=3, padx=5, pady=5, sticky='nsew')
class Bullying(Frame):
def __init__(self, parent, controller):
super().__init__(parent)
global t
def bullied():
bulliedlabel.grid(row = 3, column = 1, sticky='nsew', padx=5, pady=5)
bulliedbuttons1.grid(row = 4, column = 1, padx = 5, pady = 5)
bulliedbuttons2.grid(row = 7, column = 1, padx = 5, pady = 5)
bulliedbuttons3.grid(row = 10, column = 1, padx = 5, pady = 5)
bulliedentry.grid(row = 8, column =1, padx = 5, pady = 5, sticky = 'nsew')
bullylabel.grid_remove()
bullybuttons1.grid_remove()
bullybuttons2.grid_remove()
bullybuttons3.grid_remove()
bullyentry.grid_remove()
def bully():
bullylabel.grid(row = 3, column = 2, sticky='nsew', padx=5, pady=5)
bullybuttons1.grid(row = 4, column = 2, padx = 5, pady = 5)
bullybuttons2.grid(row = 5, column = 2, padx = 5, pady = 5)
bullybuttons3.grid(row = 6, column = 2, padx = 5, pady = 5)
bullyentry.grid(row = 7, column = 2, padx = 5, pady = 5, sticky = 'nsew')
bulliedlabel.grid_remove()
bulliedbuttons1.grid_remove()
bulliedbuttons2.grid_remove()
bulliedbuttons3.grid_remove()
bulliedentry.grid_remove()
def bulliedhome():
print(t.get())
def bulliedschool():
print(t.get())
def bulliedother():
print(t.get())
def bullyhome():
print(t.get())
def bullyschool():
print(t.get())
def bullyother():
print(t.get())
def setup():
bulliedlabel.grid(row = 3, column = 1, sticky='nsew', padx=5, pady=5)
bulliedbuttons1.grid(row = 4, column = 1, padx = 5, pady = 5)
bulliedbuttons2.grid(row = 5, column = 1, padx = 5, pady = 5)
bulliedbuttons3.grid(row = 6, column = 1, padx = 5, pady = 5)
bulliedentry.grid(row = 8, column =1, padx = 5, pady = 5, sticky = 'nsew')
bullylabel.grid(row = 3, column = 2, sticky='nsew', padx=5, pady=5)
bullybuttons1.grid(row = 4, column = 2, padx = 5, pady = 5)
bullybuttons2.grid(row = 5, column = 2, padx = 5, pady = 5)
bullybuttons3.grid(row = 6, column = 2, padx = 5, pady = 5)
bullyentry.grid(row = 7, column = 2, padx = 5, pady = 5, sticky = 'nsew')
bulliedlabel.grid_remove()
bulliedbuttons1.grid_remove()
bulliedbuttons2.grid_remove()
bulliedbuttons3.grid_remove()
bulliedentry.grid_remove()
bullylabel.grid_remove()
bullybuttons1.grid_remove()
bullybuttons2.grid_remove()
bullybuttons3.grid_remove()
bullyentry.grid_remove()
bullylab1 = Label(self, text='This is the Help Hotline page on bullying. If you think someone is a bully or being bullied, use this page.', width=85, relief='groove')
bullylab1.grid(row=0, column=1, columnspan = 2, padx=5, pady=5)
bullylab2 = Label(self, text='Press the button that is most accurate to your case. If none are accurate, type text in the text box.', width=85, relief='groove')
bullylab2.grid(row=1, column=1, columnspan = 2, padx=5, pady=5)
bullied_button = Button(self, text='Bullied', command=bullied)
bullied_button.grid(row = 2, column = 1, sticky='nsew', padx = 5, pady = 5)
bulliedlabel = Label(self, text='Location', relief='groove')
bulliedbuttons1 = Button(self, text='Home', width = 30, command=bulliedhome)
bulliedbuttons2 = Button(self, text='School', width = 30, command=bulliedschool)
bulliedbuttons3 = Button(self, text='Other', width = 30, command=bulliedother)
bulliedentry = Entry(self, textvariable = t)
bully_button = Button(self, text='Bully', command=bully)
bully_button.grid(row = 2, column = 2, sticky='nsew', padx = 5, pady = 5)
bullylabel = Label(self, text='Location', relief='groove')
bullybuttons1 = Button(self, text='Home', width = 30, command=bullyhome)
bullybuttons2 = Button(self, text='School', width = 30, command=bullyschool)
bullybuttons3 = Button(self, text='Other', width = 30, command=bullyother)
bullyentry = Entry(self, textvariable = t)
setup()
class Abuse(Frame):
def __init__(self, parent, controller):
super().__init__(parent)
abuselab1 = Label(self, text='This is the Help Hotline page on abuse. If you think someone is abusive or being abused, use this page.', width=85, relief='groove')
abuselab1.grid(row=0, column=1, columnspan = 2, padx=5, pady=5)
abuselab2 = Label(self, text='Press the button that is most accurate to your case. If none are accurate, type text in the text box.', width=85, relief='groove')
abuselab2.grid(row=1, column=1, columnspan = 2, padx=5, pady=5)
class Other(Frame):
def __init__(self, parent, controller):
super().__init__(parent)
otherlab1 = Label(self, text='This is the Help Hotline page on special cases. If you think someone is in danger or dangerous, use this page.', width=85, relief='groove')
otherlab1.grid(row=0, column=1, columnspan = 2, padx=5, pady=5)
otherlab2 = Label(self, text='Press the button that is most accurate to your case. If none are accurate, type text in the text box.', width=85, relief='groove')
otherlab2.grid(row=1, column=1, columnspan = 2, padx=5, pady=5)
root = Tk()
root.geometry('800x500')
main = MainView(root)
main.pack(side='top', fill='both', expand=True)
t = Stringvar()
root.title('Bullying and Abuse Hotline')
root.mainloop()
我想让一个条目绑定到当我按下一个小按钮时打印的文本变量t。目前，我从一开始就收到一个错误，显示在顶部。
答案 0 :(得分：0)
这可以通过确保在类定义之前定义t来解决。
将t = None添加到文件顶部为我解决了此问题。
您也可以在所有内容上方实例化变量t。
我发现的下一个问题是您为StringVar()输入了错误的名称，您还需要V也要大写