Question

我一直在关注教程，并编写了这个程序。有人可以帮我弄清楚为什么我收到错误信息。＆＃34;应用程序实例没有属性＆＃39; text＆＃39;＆＃34;

from Tkinter import *

class Application(Frame):
    """ A GUI application with three buttons."""

    def __init__(self,master):
        """ This initialized the Frame"""
        Frame.__init__(self, master)
        self.grid()
        self.create_widgets()
        self.buttonclicks = 0

    def create_widgets(self):
        """Create a button that measures clicks."""
        #create first button
        self.button1 = Button(self, text = "Total Clicks: 0")
        self.button1.grid()

        self.instruction = Label(self, text= "Enters the password")
        self.instruction.grid(row=0, column=0, columnspan=2, sticky=W)

        self.password = Entry(self)
        self.password.grid(row=1,column=1, sticky=W)

        self.button1["command"] = self.update_count
        self.button1.grid(row=2,column=0,sticky=W)

        self.submit_button = Button(self, text="Submit", command=self.reveal())

        self.texts = Text(self, width=35, height=5,wrap=WORD)
        self.texts.grid(row=4,column=1,columnspan=2,sticky=W)

    def update_count(self):
        """Increase this click count and display the new total"""
        self.buttonclicks += 1
        self.button1["text"] = "Total Clicks: " + str(self.buttonclicks)

    def reveal(self):
        """Reveal the password"""
        content = self.password.get()

        messsage=""

        if content == "password":
            message = "You have access to the data."
        else:
            message = "Access denied."

        self.texts.insert(0.0,message)



root = Tk()

root.title("GUI test")
root.geometry("250x185")

app = Application(root)

root.mainloop()

问题是我已经将文本字段定义为＆＃39;文本＆＃39;，如果它可以从属性中获取密码，我认为没有理由不能获取文本。

编辑：被问到错误：

   Traceback (most recent call last):
  File "clickcounter.py", line 58, in <module>
    app = Application(root)
  File "clickcounter.py", line 10, in __init__
    self.create_widgets()
  File "clickcounter.py", line 28, in create_widgets
    self.submit_button = Button(self, text="Submit", command=self.reveal())
  File "clickcounter.py", line 49, in reveal
    self.texts.insert(0.0,message)
  AttributeError: Application instance has no attribute 'texts'

Answer 1

更改行：

self.submit_button = Button(self, text="Submit", command=self.reveal())

到

self.submit_button = Button(self, text="Submit", command=self.reveal)

当您传递self.reveal()时，它会在self.reveal()之前调用self.texts。

你想传递函数来调用而不是调用函数的结果。

学习python，陷入了不会运行的gui程序

1 个答案: