Making a countdown timer with Python and Tkinter?

by

Tkinter already has an infinite loop running (the event loop), and a way to schedule things to run after a period of time has elapsed (using after). You can take advantage of this by writing a function that calls itself once a second to update the display. You can use a class variable to keep track of the remaining time. 

import Tkinter as tk

class ExampleApp(tk.Tk):
    def __init__(self):
        tk.Tk.__init__(self)
        self.label = tk.Label(self, text="", width=10)
        self.label.pack()
        self.remaining = 0
        self.countdown(10)

    def countdown(self, remaining = None):
        if remaining is not None:
            self.remaining = remaining

        if self.remaining <= 0:
            self.label.configure(text="time's up!")
        else:
            self.label.configure(text="%d" % self.remaining)
            self.remaining = self.remaining - 1
            self.after(1000, self.countdown)

if __name__ == "__main__":
    app = ExampleApp()
    app.mainloop()

More Related Contents:

  1. tkinter and time.sleep
  2. Tkinter — executing functions over time
  3. How to run a function periodically in python
  4. Time delay Tkinter
  5. How make a complete gui softwaree in a single windows in tkinter
  6. Tkinter assign button command in a for loop with lambda [duplicate]
  7. Adding a scrollbar to a group of widgets in Tkinter
  8. How can I schedule updates (f/e, to update a clock) in tkinter?
  9. How to bind self events in Tkinter Text widget after it will binded by Text widget?
  10. How do I handle the window close event in Tkinter?
  11. How to get the input from the Tkinter Text Widget?
  12. How to change the foreground or background colour of a Tkinter Button on Mac OS X?
  13. Tkinter adding line number to text widget
  14. Python regex match OR operator
  15. How to pass an argument to event handler in tkinter?
  16. What is the difference between root.destroy() and root.quit()?
  17. Changing the options of a OptionMenu when clicking a Button
  18. How to bundle a Python application including dependencies?
  19. How do I create a date picker in tkinter?
  20. Explain Tkinter text search method
  21. Difference between “grid” and “pack” geometry managers
  22. Disable the underlying window when a popup is created in Python TKinter
  23. How to put a tkinter window on top of the others?
  24. Python time measure function
  25. How to select at the same time from two Listbox?
  26. How to convert epoch time with nanoseconds to human-readable?
  27. Python Tkinter PhotoImage
  28. Display directory content with tkinter Treeview widget
  29. When should I use root.update() in tkInter for python
  30. How to get the Tkinter Label text?

Leave a Comment