如何在 Tkinter 中显示当前的 window？

Question

Hope you can help me with the following issue.

I'm using the library tkinter and I have a main_screen main_screen= Tk() which is looping with mainloop()

Inside of the main_screen, there is a little data form where you need to type some necessary data. And at the end of the window, I have a button to open a second window.

Once I click in that button, report_screen appears (See below in my code)

The new window should appear with the command Toplevel() and print a label that says Starting:

request_start = LabelFrame(report_screen, text="Starting...").pack()

then my program must run a process where it takes around 10 seconds to complete it.

Let's suppose that my process is just this

time.sleep(10)

And finally, run the next line:

request_done = LabelFrame(report_screen, text="Done").pack()

What is my problem?

The problem is that report_screen doesnt appear until the process of 10 sec has finished, and appears with both labels "Starting..." and "Done" at the same time.

I don't want that, I require that report_screen appears with the label "Starting", and then run the process, and when the process finished, add the "Done" label

This is the part of my code where I have this issue

report_screen = Toplevel()

request_start = Label(report_screen, text="Starting...").pack()

time.sleep(10) #example of my process that takes around 10 seconds

request_done = Label(report_screen, text="Done").pack()

Answer 1

Using update() method works to update whatever is in the screen