Python:__init__() 需要 2 个位置参数，但给出了 3 个 [英] Python: __init__() takes 2 positional arguments but 3 were given

问题描述

我正在尝试使用 Tkinter 创建一个简单的 UI，但遇到了一个问题.我的代码如下所示:

I'm trying to create a simple UI with Tkinter and I have run into a problem. My code looks like this:

class UIController(tk.Tk):
    def __init__(self, master=None):
        tk.Frame.__init__(self, master)
        container = tk.Frame(self)
        container.pack(side="top", fill="both", expand=True)
        self.frames = {}
        for F in (StartPage, BrowsePage, StudentPage):
            frame = F(self, container)
            self.frames[F] = frame
            frame.title("StudyApp")
        self.showFrame(StartPage)
        self.centerWindow()

    def showFrame(self, c):
        frame = self.frames[c]
        frame.tkraise()

    def centerWindow(self):
        w = 300
        h = 350
        sw = self.master.winfo_screenwidth()
        sh = self.master.winfo_screenheight()
        x = (sw - w)/2
        y = (sh - h)/2
        self.master.geometry('%dx%d+%d+%d' % (w, h, x, y))

class StartPage(tk.Frame):
    def __init__(self, master):
        tk.Frame.__init__(self, master)
        self.pack()

        self.L1 = Label(self, text="Search by credits:")
        self.L1.place(x=18, y=45)

        self.startYear = Entry(self, bd=2)
        self.startYear.place(x=20, y=70)
        self.startYear.bind("<Return>", View.enter(startYear.get()))

        self.quitButton = Button(self, text="Quit", command=sys.exit)
        self.quitButton.pack(side="bottom", padx=5, pady=5, fill=X)

        self.searchButton = Button(self, text="Search")
        self.searchButton.pack(side="bottom", padx=5, pady=0, fill=X)   

class BrowsePage(tk.Frame):
    def __init__(self, master):
        tk.Frame.__init__(self, master)

class StudentPage(tk.Frame):
    def __init__(self, master):
        tk.Frame.__init__(self, master)

root = tk.Tk()
root.resizable(width=False, height=False)
uicontrol = UIController(root)
root.mainloop()

它给出了一个 TypeError 构造函数接受 2 个参数但给出了 3 个参数.我想要做的是在框架容器"中包含 3 个页面(StartPage、BrowsePage 和 StudentPage)，并根据需要通过按钮等操作将它们调出.我不明白为什么我会收到这个错误.

It gives a TypeError that the constructor takes 2 arguments but 3 were given. What I'm trying to do is have the 3 pages (StartPage, BrowsePage and StudentPage) in the frame 'container', and bring them up as needed with button pushes and such. I don't understand why I'm getting this error.

添加了 UIController 调用.

Added the UIController call.

编辑 2:

添加了页面类 StartPage、BrowsePage 和 StudentPage.后两个类此时只是外壳.

Added the page classes StartPage, BrowsePage and StudentPage. The latter two classes are only husks at this point.

推荐答案

我认为这是导致问题的行，您不能将 self 实例传递给构造函数.

I think this is the line that is causing the issue, you cannot pass the self instance to the constructor.

frame = F(self, container)

能否请您检查问题并向其添加更多信息以了解您要实现的目标.

Can you please check and add more information to the question to understand what you are trying to achieve.

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