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第一个问题是我收到一个错误：

“AttributeError：应用实例没有属性‘after’”

我认为这与我声明 countdown() 的方式有关，但我不知道如何解决它。

class App:
    def __init__(self, master):
        frame = Frame(master)
        master.title("Araña en la Cabaña")
        master.configure(background="black")

        master.puntuacion= Label(master, text="Araña en la Cabaña", font=("American Typewriter", 40),bg="black", fg="red", justify=CENTER)
        master.puntuacion.grid(row=0, column=2)

        master.team_A_label= Label(master, textvariable= team_A, font=("American Typewriter", 30),bg="black", fg="red")
        master.team_A_label.grid(row=1, column=1)
        master.team_B_label= Label(master, textvariable= team_B, font=("American Typewriter", 30),bg="black", fg="red")
        master.team_B_label.grid(row=1, column=3)

        master.team_A_score_label= Label(master, textvariable= team_A_score, font=("04B", 35),bg="black", fg="yellow").grid(row=2, column=1)

        master.team_B_score_label= Label(master, textvariable= team_B_score, font=("04B", 35),bg="black", fg="yellow")
        master.team_B_score_label.grid(row=2, column=3)

        master.team_at_play_label= Label(master, textvariable= team_at_play, font=("American Typewriter", 30),fg="yellow", bg="black")
        master.team_at_play_label.grid(row=3, column=2)

        master.pregunta_start = Label(master, text="¿Cómo se traduce....?", font=("American Typewriter", 30),fg="orange",bg="black")
        master.pregunta_start.grid(row=6, column=2)

        master.pregunta_finish = Label(master, textvariable = pregunta, font=("American Typewriter", 30),fg="green",bg="black")
        master.pregunta_finish.grid(row=7, column=2)

        master.clock_label = Label(master, text="El Reloj:", font=("American Typewriter", 20),fg="red",bg="black")
        master.clock_label.grid(row = 6, column= 0)

        master.reloj = Label(master, textvariable = time_left, font=("American Typewriter", 30),fg="red",bg="black")
        master.reloj.grid(row = 7, column= 0)
        master.team_answer = Entry(master, textvariable=team_answer, width=50)
        master.team_answer.grid(row=8, column=2)
        master.team_answer.focus_set()
        master.feedback_label = Label(textvariable= feedback, font=("American Typewriter", 30),fg="green",bg="black")
        master.feedback_label.grid(row=9, column=2)
        master.traduccion_label = Label(master, text = "La traducción correcta es:", font=("American Typewriter", 20),fg="green",bg="black")
        master.traduccion_label.grid(row=10, column=1)
        master.give_correct_answer = Label(master, textvariable = give_answer, font=("American Typewriter", 20), fg="green", bg="black")
        master.give_correct_answer.grid(row=10, column =2)
        master.respond_button = Button(master, text="Responder",bg="black", command=check_response, justify=CENTER, borderwidth=.001)
        master.respond_button.grid(row=10, column=3)
        master.bind("<Return>", check_response)

        master.continue_button = Button(master, text="Adelante", bg="black", command=player_turn)
        master.continue_button.grid(row=10, column=4)



    def countdown(master, remaining = None):
        if remaining is not None:
            remaining = remaining

        if remaining <= 0:
#             master.label.configure
            time_left.set("¡Se acabó el tiempo!")
        else:
#             master.reloj.configure(text="%d" % master.remaining)
            time_left.set(remaining)
            remaining = remaining - 1
            master.after(1000, master.countdown)
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2 回答 2

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错误消息准确地告诉您问题所在：

“AttributeError：应用实例没有属性‘after’”

这意味着，您正在做的某处self.after(...)，但您尚未定义名为 的方法after，并且您也没有继承一个方法。after是一种适用于所有 tkinter 小部件的方法，但App不是小部件，也不继承自一个小部件。

由于您传入master了 countdown 方法，并且master是一个小部件，因此您可以在其上调用 after：

def countdown(self, master, ...):
    ...
    master.after(...)

另一种解决方案是保存master为应用程序的属性，并使用它而不是将其传递给函数：

def __init__(self, master):
    self.master = master
    ...
def countdown(self, ...):
    ...
    self.master.after(...)
于 2013-09-07T11:09:01.523 回答
0

countdown应该self作为它的第一个论点：

    def countdown(self, master, remaining = None):
        if remaining is not None:
            remaining = remaining

        if remaining <= 0:
#             master.label.configure
            time_left.set("¡Se acabó el tiempo!")
        else:
#             master.reloj.configure(text="%d" % master.remaining)
            time_left.set(remaining)
            remaining = remaining - 1
            master.after(1000, master.countdown)

就像现在一样，master指向App实例，并且您期望传递的内容master实际传递为remaining. 相关地，我怀疑你的真实代码如果它给你那个特定的错误消息会有所不同，因为使用这个代码你应该更早地得到错误。

于 2013-09-07T05:12:24.030 回答