python中的进度条更新答案

【问题标题】：Progress bar update in pythonpython中的进度条更新
【发布时间】：2020-04-17 07:56:26
【问题描述】：

我在 stackoverflow 中搜索如何在 tkinter 中实现 ProgressBar。这是代码：

def worker(x):

    return x+x
    #time.sleep(1)

def compute():

    pool = multiprocessing.Pool(2)
    objects=range(1,10)
    for i, _ in enumerate(pool.imap_unordered(worker, objects), 1):
        #print("completed =" +str(i/len(listF)))
        scanned.set((i/len(objects)*100))


if __name__ == '__main__':
    window = Tk()
    frame = Frame(master = window)
    frame.grid(row=0,column=0)
    button2 = Button(master=frame,text="Start", command=compute)
    button2.pack()

    frame = Frame(master = window)
    scanned = IntVar()
    frame.grid(row=3,column=0,padx=5,pady=10)
    progress = Progressbar(master=frame, orient='horizontal',maximum=100,  variable=scanned,mode='determinate')
    progress.pack()

    window.mainloop()

我发现这应该可行，但不适用于我的情况，因为条形图一次全部更新为 100%，而我看不到中间步骤。

【问题讨论】：

标签： python tkinter progress-bar

【解决方案1】：

大家好，我解决了添加线程的问题。这是代码：

def worker(x):

    return x+x
    #time.sleep(1)

def precompute():

    t=threading.Thread(target=compute)
    t.start()

def compute():


    pool = multiprocessing.Pool(2)
    objects=range(1,1000)
    for i, _ in enumerate(pool.imap(worker, objects), 1):
        #print("completed =" +str(i/len(listF)))
        scanned.set((i/len(objects)*100))


if __name__ == '__main__':
    window = Tk()
    frame = Frame(master = window)
    frame.grid(row=0,column=0)
    button2 = Button(master=frame,text="Start", command=precompute)
    button2.pack()

    frame = Frame(master = window)
    scanned = IntVar()
    frame.grid(row=3,column=0,padx=5,pady=10)
    progress = Progressbar(master=frame, orient='horizontal',maximum=100,  variable=scanned,mode='determinate')
    progress.pack()

    window.mainloop()

【讨论】：