Python 3.5 tkinter 确认框创建进度条并读取 csv 不太有效

Question

我真的是 python 的新手，正在制作一个 GUI 应用程序来执行大量文件 i/o 和处理。为了完成这个，我想在用户提交和操作时弹出一个确认框。从这里单击 'yes' 应用程序然后运行 i/o 并显示进度条。

从这里的其他线程中，我了解到需要创建一个附加线程来执行这些进程之一（例如 Tkinter: ProgressBar with indeterminate duration and Python Tkinter indeterminate progress bar not running 非常有帮助）。

但是，我有点迷路了，因为我没有从 Main() 函数激活线程进程。所以我仍然不知道应该如何以及在哪里创建进度条并将 i/o 进程传递给另一个线程（在此处读取 csv 文件）。

这是我的代码，如果有人能给我任何帮助，我将不胜感激：

import tkinter as tk
import tkinter.messagebox as messagebox
import csv
import tkinter.ttk as ttk
import threading

class ReadIn(tk.Frame):
    def __init__(self, parent, *args, **kwargs):
        tk.Frame.__init__(self, parent, *args, **kwargs)
        self.parent = parent
        self.initUI()

    def initUI(self):
        self.parent.title("Read in file and display progress")
        self.pack(fill=tk.BOTH, expand=True)

        self.TestBtn = tk.Button(self.parent, text="Do Something", command=lambda: self.confirm_pb())
        self.TestBtn.pack()

    def confirm_pb(self):
        result = messagebox.askyesno("Confirm Action", "Are you sure you want to?")
        if result:
            self.handle_stuff()

    def handle_stuff(self):
        nf = threading.Thread(target=self.import_csv)
        nf.start()
        self.Pbar()
        nf.join()

    def Pbar(self):
        self.popup = tk.Tk()
        self.popup.title('Loading file')
        self.label = tk.Label(self.popup, text="Please wait until the file is created")
        self.progressbar = ttk.Progressbar(self.popup, orient=tk.HORIZONTAL, length=200,
                                           mode='indeterminate')
        self.progressbar.pack(padx=10, pady=10)
        self.label.pack()
        self.progressbar.start(50)


    def import_csv(self):
        print("Opening File")
        with open('csv.csv', newline='') as inp_csv:
            reader = csv.reader(inp_csv)
            for i, row in enumerate(reader):
                # write something to check it reading
                print("Reading Row " + str(i))

def main():
    root = tk.Tk()  # create a Tk root window
    App = ReadIn(root)
    root.geometry('400x300+760+450')
    App.mainloop()  # starts the mainloop

if __name__ == '__main__':
    main()

Answer 1

函数handle_stuff()中的语句nf.join()将阻塞tkinter的主循环以显示进度条window。尝试修改 handle_stuff() 如下：

def handle_stuff(self):
    nf = threading.Thread(target=self.import_csv)
    nf.start()
    self.Pbar()
    #nf.join() # don't call join() as it will block tkinter's mainloop()
    while nf.is_alive():
        self.update() # update the progress bar window
    self.popup.destroy()

Python 3.5 tkinter 确认框创建进度条并读取 csv 不太有效

Python 3.5 tkinter confirmation box created progress bar and reads in csv not quite working

user-interface

tkinter

python-3.x

progress-bar