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尝试学习python，NameError：未定义全局名称'controller'

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Tkinter回调中的异常回溯（最近一次调用最后一次）：文件“/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py”，第1536行，在电话中return self.func（* args）file“tk_cp_successful.py”，第143行，在command = lambda：controller.show_frame（StartPage））

我的错误是

NameError：未定义全局名称“controller”

class LoginPage(tk.Frame):
     def __init__(self, parent, controller):
      global entry_1
      global entry_2
      tk.Frame.__init__(self, parent)
      label = tk.Label(self, text="test page")
      label.pack(pady=20,padx=20)

      label_1 = Label(self, text="Username")
      label_1.pack()
      label_2 = Label(self, text="Password")
      label_2.pack()
      entry_1 = Entry(self)
      entry_1.pack()
      entry_2 = Entry(self, show="*")
      entry_2.pack()
      label_1.grid(row=0, sticky=E)
      label_1.pack()
      label_2.grid(row=1, sticky=E)
      label_2.pack()
      entry_1.grid(row=0, column=1)
      entry_1.pack()
      entry_2.grid(row=1, column=1)
      entry_2.pack()
      checkbox = Checkbutton(self, text="Keep me logged in")

      checkbox.grid(columnspan=2)
      checkbox.pack()
      logbtn = Button(self, text="Login", command = self.tested)
      logbtn.grid(columnspan=2)
      logbtn.pack()


     def tested(self):
        #print("Clicked")
        username = entry_1.get()
        password = entry_2.get()

        #print(username, password)

        if username == "test" and password == "test":
            #box.showinfo("Login successful", "Welcome test")
            button1 = ttk.Button(self, text="Back to new page", command=lambda: controller.show_frame(newPage))
            button1.pack()
        else:
            box.showerror("Login failed", "Incorrect username")
python

1 回答

  • 0

    您需要将控制器保存到成员变量/字段中 .

    class LoginPage(tk.Frame):
    def __init__(self, parent, controller):
        self.controller = controller 
        # other code 

   def tested(self):
       # other code 
       # access with self.controller
    回复于

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