Question

我有一个超类（tk窗口）和另一个继承原始类属性的子类（tk窗口）。在超类上，我有一个方法callback每秒调用一次。子类显示一个tk选项菜单，我想通过每秒调用的超类方法更新tk选项菜单中显示的选项。我已经创建了一个缩短版的程序，它通常显示了我正在尝试做的事情。这个程序将运行，它按照我的意愿运行，但是在pycharm中我收到一个突出显示子类方法def update(self, controller):的警告：

Signature of method 'OtherPage.update()' does not match 
   signature of base method in class 'Misc'

这样做的正确方法是什么？

import tkinter as tk

exchanges = ['Bitfinex', 'Bittrex', 'Kraken', 'Gdax']

class Trader(tk.Tk):

    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        tk.Tk.wm_title(self, "Multi-Trader-Wallet")

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

        menubar = tk.Menu(container)

        filemenu = tk.Menu(menubar, tearoff=0)
        filemenu.add_command(label='Exit', command=lambda: print('exit'))
        menubar.add_cascade(label='File', menu=filemenu)

        tk.Tk.config(self, menu=menubar)
        self.exchange1 = tk.StringVar()
        self.frames = {}
        self.id = self.after(1000, self.callback)

        for F in (MainPage, OtherPage):

            frame = F(container, self)

            self.frames[F] = frame

            frame.grid(row=0, column=0, columnspan=1, rowspan=1, sticky="nsew")

        self.show_frame(OtherPage)

    def show_frame(self, cont):

        frame = self.frames[cont]

        frame.tkraise()

    def callback(self):

        print('callback')
        print(self.frames[OtherPage])
        self.frames[OtherPage].update(self)
        self.id = self.after(1000, self.callback)


class MainPage(tk.Frame):

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

        label = tk.Label(self, text='MainPage')
        label.grid(row=1, column=1)


class OtherPage(tk.Frame):

    def __init__(self, parent, controller):

        tk.Frame.__init__(self, parent)

        label2 = tk.Label(self, text='OtherPage')
        label2.grid(row=1, column=1)

        drop = tk.OptionMenu(self, controller.exchange1, *exchanges)
        drop.config(width=10)
        drop.grid(row=2, column=1)

    def update(self, controller):
        exchanges.append('new exchange')
        drop = tk.OptionMenu(self, controller.exchange1, *exchanges)
        drop.config(width=10)
        drop.grid(row=2, column=1)

app = Trader()

app.mainloop()

python update tk.optionmenu下拉选择

0 个答案: