Python Tkinter对象没有属性 [英] Python tkinter- object has no attribute

问题描述

我正在尝试更改按钮的状态，但出现属性错误，这是整个Traeback的副本，以供参考:

I am trying to change the state of the button but I get an attribute error, here is a copy of the entire traeback for reference:

Traceback (most recent call last):
  File "C:/Users/Test_Practice.py", line 53, in <module>
middle_buttons_class().Run_Button()
  File "C:/Users/Test_Practice.py", line 14, in Run_Button
run_thread = threading.Thread(target=middle_buttons_class.Run_Robot_Files(self))
  File "C:/Users/Test_Practice.py", line 23, in Run_Robot_Files
progress_bar().done_progress.config(state=tkinter.NORMAL)
AttributeError: 'progress_bar' object has no attribute 'done_progress'

我相信这可能是一个时髦的线程问题，但是我不确定，有人可以帮我吗?

I believe this may be a funky threading problem but I am not sure, can someone take a look for me?

class MiddleButtonsClass():

    def run_button(self):
        run_thread = threading.Thread(target=middle_buttons_class.Run_Robot_Files(self))
        run_thread.daemon = True
        run_thread.start()

    def run_robot_files(self):

        print("Tasks started")
        progress_bar().progress_bar_thread()
        progress_bar().done_progress.config(state=tkinter.NORMAL)


class ProgressBar():

    def progress_bar_thread(self):
        progress_bar_class = progress_bar()
        progress_thread = threading.Thread(target=progress_bar_class.initialize_progress_bar())
        progress_thread.daemon = True
        progress_thread.start()

    def initialize_progress_bar(self):
        self.progress_window = tkinter.Toplevel()
        self.progress_window.geometry("500x250")
        self.progress_window.title("In Progress")
        self.percentage_variable = tkinter.DoubleVar()
        self.progressbar = tkinter.ttk.Progressbar(self.progress_window, style='text.Horizontal.TProgressbar',
                                   variable=self.percentage_variable, maximum=500,
                                   length=450, mode="determinate")
        self.progressbar.pack(pady=100)
        self.done_progress = tkinter.Button(self.progress_window, text="Done", state=tkinter.DISABLED,
                                   command=None)
        self.done_progress.pack()



if __name__ == "__main__":
    master = tkinter.Tk()
    master.title("Test Runner")
    master.geometry("750x500")
    middle_buttons_class().Run_Button()
    master.mainloop()

推荐答案

所以您的问题是您试图从progress_bar()的2个单独实例进行编辑.您应该做的是创建一个要使用的变量，然后从那里编辑类属性.我还将您的线程目标更改为使用self，而不是尝试创建另一个类的实例.

So your problem is you are trying to edit from 2 separate instance of progress_bar(). What you should be doing is creating a variable to work with and then edit the class attributes from there. I also changed your thread target to use self instead of trying to create another instance of class.

这是对您的代码进行重新制作以实际生成顶层窗口的方法，我向该按钮添加了一个命令，向您显示进度条的简单更新.

Here is your code reworked to actually produce a top level window and I added a command to the button to show you a simple update of the progress bar.

这表示您的代码需要一些改进.

That said your code needs some refinement.

import tkinter
import threading
import tkinter.ttk as ttk

class middle_buttons_class():

    def Run_Button(self):
        run_thread = threading.Thread(target=self.Run_Robot_Files())
        run_thread.daemon = True
        run_thread.start()

    def Run_Robot_Files(self):

        print("Tasks started")
        progress_bar_var = progress_bar()
        progress_bar_var.progress_bar_thread()
        progress_bar_var.done_progress.config(state=tkinter.NORMAL)


class progress_bar():

    def progress_bar_thread(self):
        progress_bar_class = self
        progress_thread = threading.Thread(target=progress_bar_class.initialize_progress_bar())
        progress_thread.daemon = True
        progress_thread.start()

    def initialize_progress_bar(self):
        self.progress_window = tkinter.Toplevel()
        self.progress_window.geometry("500x250")
        self.progress_window.title("In Progress")
        self.percentage_variable = tkinter.DoubleVar()
        self.progressbar = tkinter.ttk.Progressbar(self.progress_window, style='text.Horizontal.TProgressbar',
                                variable=self.percentage_variable, maximum=500,length=450, mode="determinate")
        self.progressbar.pack(pady=100)
        self.done_progress = tkinter.Button(self.progress_window, text="Done", state=tkinter.DISABLED,command=self.update_progressbar)
        self.done_progress.pack()

    def update_progressbar(self):
        self.percentage_variable.set(self.percentage_variable.get() + 10)

if __name__ == "__main__":
    master = tkinter.Tk()
    master.title("Test Runner")
    master.geometry("750x500")
    middle_buttons_class().Run_Button()
    master.mainloop()

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