Ndtyjky

I have read all similar questions asked but I still can't figure out how to solve the error. I am creating a countdown timer that will update and show the remaining time on the 'timeLeft' label(code below). However, I keep getting this error when I try to update the label with function start_count() :

self.timeLeft.config(text= str(mins) +"分"+ str(secs) +"秒")

AttributeError: 'PracticePage' object has no attribute 'timeLeft'

Below is part of my code:

    class PracticePage(tk.Frame):

        def __init__(self, parent, controller):

            tk.Frame.__init__(self, parent)

            timeLeft = tk.Label(self,text= "")

            backButton = ttk.Button(self, text="やり直す", command = lambda: controller.show_frame(StartPage))

            homeButton = ttk.Button(self, text="サインアウト", command = lambda:controller.show_frame(SignInPage))



            timeLeft.pack()

            backButton.pack()

            homeButton.pack()

            self.start_count(120)



        def start_count(self,t):

            global mins

            global secs

            time = t

            while time>0:

                mins, secs = divmod(time,60)

                mins = round(mins)

                secs = round(secs)

                self.timeLeft.config(text= str(mins) +"分"+ str(secs) +"秒")

                time = time-1

                if (time==0):

                   break

Can someone help? Thank you in advance.

You seam to misunderstand how a class attribute works or what exactly self. is doing.

The self. prefix is used to tell the class that a specific variable or function is being assigned as a class attribute or method.

Here you have created a variable in the __init__ method called timeLeft however you try to access it later with self.timeLeft. This will not work as timeLeft was defined as a local variable only to the __init__ method.

To correct this simply make sure timeLeft is updated to be self.timeLeft anywhere in your code and it should work fine from there.

Updated class:

class PracticePage(tk.Frame):

    def __init__(self, parent, controller):

        tk.Frame.__init__(self, parent)

        self.timeLeft = tk.Label(self,text= "")

        backButton = ttk.Button(self, text="やり直す", command = lambda: controller.show_frame(StartPage))

        homeButton = ttk.Button(self, text="サインアウト", command = lambda:controller.show_frame(SignInPage))



        self.timeLeft.pack()

        backButton.pack()

        homeButton.pack()

        self.start_count(120)



    def start_count(self,t):

        global mins

        global secs

        time = t

        while time>0:

            mins, secs = divmod(time,60)

            mins = round(mins)

            secs = round(secs)

            self.timeLeft.config(text= str(mins) +"分"+ str(secs) +"秒")

            time = time-1

            if (time==0):

               break