如何在tkinterlab中显示变量值

Question

这是我第一次进入特金特。我在应用程序中使用了面向对象的方法，但无法在tkinter标签中显示变量值。我使用的是python3.7.1。你知道吗

我试过其他帖子中的许多建议，比如将我的字符串转换为tkinter的StringVar（），并用“text=…”和“textvariable=…”显示它们，但到目前为止，一切都证明是徒劳的。你知道吗

import tkinter as tk

class NPCApp(tk.Tk):

    def __init__(self, *args, **kwargs):

        tk.Tk.__init__(self, *args, **kwargs)

        container = tk.Frame(self)
        container.pack(side="top", fill="both", expand=True)
        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}
        self.profession = None

        for F in (StartPage, PageOne):
            frame = F(container, self)
            self.frames[F] = frame
            frame.grid(row=0, column=0, stick="nsew")

        self.show_frame(StartPage)


    def show_frame(self, cont):
        frame = self.frames[cont]
        frame.tkraise()

    def setProfession(self, given_profession):
        self.profession = given_profession

    def getProfession(self):
        return self.profession


class StartPage(tk.Frame):

    def __init__(self, parent, controller):

        tk.Frame.__init__(self, parent)
        tk.Label(self, text="Choose a profession for your NPC:").pack(pady=10, padx=10)

        tk.Radiobutton(self, text="Herbalist/Alchemist", variable=controller.profession, value="Herbalist", command=lambda: controller.setProfession("Herbalist")).pack()
        tk.Radiobutton(self, text="Blacksmith", variable=controller.profession, value="Smith", command=lambda: controller.setProfession("Smith")).pack()
        tk.Radiobutton(self, text="Shopkeeper", variable=controller.profession, value="Shopkeep", command=lambda: controller.setProfession("Shopkeep")).pack()
        tk.Radiobutton(self, text="Innkeep", variable=controller.profession, value="Innkeep", command=lambda: controller.setProfession("Innkeep")).pack()
        tk.Radiobutton(self, text="Officer of the city watch", variable=controller.profession, value="Officer", command=lambda: controller.setProfession("Officer")).pack()
        tk.Radiobutton(self, text="Member of the city watch", variable=controller.profession, value="Soldier", command=lambda: controller.setProfession("Soldier")).pack()
        tk.Radiobutton(self, text="Member of a council of elders", variable=controller.profession, value="Councilmember", command=lambda: controller.setProfession("Councilmember")).pack()
        tk.Radiobutton(self, text="Regular citizen", variable=controller.profession, value="Citizen", command=lambda: controller.setProfession("Citizen")).pack()
        tk.Radiobutton(self, text="Foreign human", variable=controller.profession, value="Foreigner", command=lambda: controller.setProfession("Foreigner")).pack()

        tk.Button(self, text="To Page One",
                            command=lambda: controller.show_frame(PageOne)).pack()


class PageOne(tk.Frame):

    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)

        tk.Label(self, text=controller.getProfession()).pack(pady=10, padx=10)

        tk.Button(self, text="Back to Home",
                            command=lambda: controller.show_frame(StartPage)).pack()


app = NPCApp()
app.mainloop()

你在这里看到的是我的申请表。您可以使用单选按钮从NPC职业中进行选择，并在内部设置相应的值，这是经过测试的，工作正常。但是，在标签的第一页上显示所述值不起作用。该页面显示一个空格，后跟“返回主页”按钮，但应该显示所选的职业，然后在其下方显示所说的按钮。你知道吗

帮我堆满，你是我唯一的希望。你知道吗

Answer 1

我建议您让getProfession返回一个StringVar并更改setProfession以设置该StringVar（在__init__中创建它）。然后你可以创建你的油箱标签无论何时调用textvariable=controller.getProfession()，标签文本都将从StringVar更新。你知道吗

class NCApp(tk.Tk):
    def __init__(...):
        self.profession = tk.StringVar()
        ...
    def setProfession(self, given_profession):
        self.profession.set(given_profession)
    def getProfession(self):
        return self.profession

class PageOne(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        self.label = tk.Label(self, textvariable=controller.getProfession())
        self.label.pack(pady=10, padx=10)
        ...