将输入框从classA传递到B类tkinter Python中的标签

from tkinter import *

class classA:
    def __init__(self, master):
        self.master = master
        self.entry = Entry(master)
        self.entry.pack()

        self.value = StringVar()  # 创建一个StringVar变量用于存储输入框的值
        self.entry['textvariable'] = self.value  # 绑定变量与输入框

        self.button = Button(master, text="传递", command=self.pass_value)
        self.button.pack()

    def pass_value(self):
        value = self.value.get()  # 获取输入框的值
        classB(value)  # 创建classB的实例并将值传递给它

root = Tk()
classA(root)
root.mainloop()

from tkinter import *

class classB:
    def __init__(self, value):
        self.top = Toplevel()  # 创建一个顶级窗口
        self.label = Label(self.top, text=value)  # 创建一个标签并设置文本为传递过来的值
        self.label.pack()

root = Tk()
classB(root)
root.mainloop()