Making a countdown timer with Python and Tkinter?
6
I want to set a label in Tkinter using my countdown timer function. Right now all it does is set the lable to "10" once 10 is reached and I don't really understand why. Also, even if I have the timer print to a terminal instead the "Time's up!" bit never prints.
import time
import tkinter as tk
class App():
def __init__(self):
self.root = tk.Tk()
self.label = tk.Label(text="null")
self.label.pack()
self.countdown()
self.root.mainloop()
# Define a timer.
def countdown(self):
p = 10.00
t = time.time()
n = 0
# Loop while the number of seconds is less than the integer defined in "p"
while n - t < p:
n = time.time()
if n == t + p:
self.label.configure(text="Time's up!")
else:
self.label.configure(text=round(n - t))
app=App()
python time tkinter
edited Apr 26 '18 at 15:17
Aran-Fey
20.7k53571
asked May 15 '12 at 8:36
Ryan HasseRyan Hasse
1201214
add a comment |
6
I want to set a label in Tkinter using my countdown timer function. Right now all it does is set the lable to "10" once 10 is reached and I don't really understand why. Also, even if I have the timer print to a terminal instead the "Time's up!" bit never prints.
import time
import tkinter as tk
class App():
def __init__(self):
self.root = tk.Tk()
self.label = tk.Label(text="null")
self.label.pack()
self.countdown()
self.root.mainloop()
# Define a timer.
def countdown(self):
p = 10.00
t = time.time()
n = 0
# Loop while the number of seconds is less than the integer defined in "p"
while n - t < p:
n = time.time()
if n == t + p:
self.label.configure(text="Time's up!")
else:
self.label.configure(text=round(n - t))
app=App()
python time tkinter
edited Apr 26 '18 at 15:17
Aran-Fey
20.7k53571
asked May 15 '12 at 8:36
Ryan HasseRyan Hasse
1201214
here's a code example of a countdown implemented using Tkinter
– jfs
Mar 3 '15 at 9:15
add a comment |
6
6
6
3
I want to set a label in Tkinter using my countdown timer function. Right now all it does is set the lable to "10" once 10 is reached and I don't really understand why. Also, even if I have the timer print to a terminal instead the "Time's up!" bit never prints.
import time
import tkinter as tk
class App():
def __init__(self):
self.root = tk.Tk()
self.label = tk.Label(text="null")
self.label.pack()
self.countdown()
self.root.mainloop()
# Define a timer.
def countdown(self):
p = 10.00
t = time.time()
n = 0
# Loop while the number of seconds is less than the integer defined in "p"
while n - t < p:
n = time.time()
if n == t + p:
self.label.configure(text="Time's up!")
else:
self.label.configure(text=round(n - t))
app=App()
python time tkinter
edited Apr 26 '18 at 15:17
Aran-Fey
20.7k53571
asked May 15 '12 at 8:36
Ryan HasseRyan Hasse
1201214
I want to set a label in Tkinter using my countdown timer function. Right now all it does is set the lable to "10" once 10 is reached and I don't really understand why. Also, even if I have the timer print to a terminal instead the "Time's up!" bit never prints.
import time
import tkinter as tk
class App():
def __init__(self):
self.root = tk.Tk()
self.label = tk.Label(text="null")
self.label.pack()
self.countdown()
self.root.mainloop()
# Define a timer.
def countdown(self):
p = 10.00
t = time.time()
n = 0
# Loop while the number of seconds is less than the integer defined in "p"
while n - t < p:
n = time.time()
if n == t + p:
self.label.configure(text="Time's up!")
else:
self.label.configure(text=round(n - t))
app=App()
python time tkinter
python time tkinter
edited Apr 26 '18 at 15:17
Aran-Fey
20.7k53571
asked May 15 '12 at 8:36
Ryan HasseRyan Hasse
1201214
edited Apr 26 '18 at 15:17
Aran-Fey
20.7k53571
asked May 15 '12 at 8:36
Ryan HasseRyan Hasse
1201214
edited Apr 26 '18 at 15:17
Aran-Fey
20.7k53571
edited Apr 26 '18 at 15:17
Aran-Fey
20.7k53571
edited Apr 26 '18 at 15:17
Aran-Fey
20.7k53571
20.7k53571
asked May 15 '12 at 8:36
Ryan HasseRyan Hasse
1201214
asked May 15 '12 at 8:36
Ryan HasseRyan Hasse
1201214
asked May 15 '12 at 8:36
Ryan HasseRyan Hasse
1201214
1201214
here's a code example of a countdown implemented using Tkinter
– jfs
Mar 3 '15 at 9:15
add a comment |
here's a code example of a countdown implemented using Tkinter
– jfs
Mar 3 '15 at 9:15
here's a code example of a countdown implemented using Tkinter
– jfs
Mar 3 '15 at 9:15
here's a code example of a countdown implemented using Tkinter
– jfs
Mar 3 '15 at 9:15
add a comment |
1 Answer
1
active
oldest
votes
8
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()
answered May 15 '12 at 11:07
Bryan OakleyBryan Oakley
219k22266430
That explains a lot, thank you. I was wondering why it only updates once the last item is reached even after I rewrote it a few different ways.
– Ryan Hasse
May 15 '12 at 11:49
@RyanHasse: the display only updates when Tkinter can respond to events that tell it to update the display. These events only get processed by the event loop. If you have your own loop, it will starve the event loop, preventing redraw requests from happening.
– Bryan Oakley
May 15 '12 at 12:54
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f10596988%2fmaking-a-countdown-timer-with-python-and-tkinter%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
8
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()
answered May 15 '12 at 11:07
Bryan OakleyBryan Oakley
219k22266430
That explains a lot, thank you. I was wondering why it only updates once the last item is reached even after I rewrote it a few different ways.
– Ryan Hasse
May 15 '12 at 11:49
@RyanHasse: the display only updates when Tkinter can respond to events that tell it to update the display. These events only get processed by the event loop. If you have your own loop, it will starve the event loop, preventing redraw requests from happening.
– Bryan Oakley
May 15 '12 at 12:54
add a comment |
8
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()
answered May 15 '12 at 11:07
Bryan OakleyBryan Oakley
219k22266430
That explains a lot, thank you. I was wondering why it only updates once the last item is reached even after I rewrote it a few different ways.
– Ryan Hasse
May 15 '12 at 11:49
@RyanHasse: the display only updates when Tkinter can respond to events that tell it to update the display. These events only get processed by the event loop. If you have your own loop, it will starve the event loop, preventing redraw requests from happening.
– Bryan Oakley
May 15 '12 at 12:54
add a comment |
8
8
8
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()
answered May 15 '12 at 11:07
Bryan OakleyBryan Oakley
219k22266430
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()
answered May 15 '12 at 11:07
Bryan OakleyBryan Oakley
219k22266430
edited May 15 '12 at 11:12
answered May 15 '12 at 11:07
Bryan OakleyBryan Oakley
219k22266430
answered May 15 '12 at 11:07
Bryan OakleyBryan Oakley
219k22266430
answered May 15 '12 at 11:07
Bryan OakleyBryan Oakley
219k22266430
219k22266430
That explains a lot, thank you. I was wondering why it only updates once the last item is reached even after I rewrote it a few different ways.
– Ryan Hasse
May 15 '12 at 11:49
@RyanHasse: the display only updates when Tkinter can respond to events that tell it to update the display. These events only get processed by the event loop. If you have your own loop, it will starve the event loop, preventing redraw requests from happening.
– Bryan Oakley
May 15 '12 at 12:54
add a comment |
That explains a lot, thank you. I was wondering why it only updates once the last item is reached even after I rewrote it a few different ways.
– Ryan Hasse
May 15 '12 at 11:49
@RyanHasse: the display only updates when Tkinter can respond to events that tell it to update the display. These events only get processed by the event loop. If you have your own loop, it will starve the event loop, preventing redraw requests from happening.
– Bryan Oakley
May 15 '12 at 12:54
That explains a lot, thank you. I was wondering why it only updates once the last item is reached even after I rewrote it a few different ways.
– Ryan Hasse
May 15 '12 at 11:49
That explains a lot, thank you. I was wondering why it only updates once the last item is reached even after I rewrote it a few different ways.
– Ryan Hasse
May 15 '12 at 11:49
@RyanHasse: the display only updates when Tkinter can respond to events that tell it to update the display. These events only get processed by the event loop. If you have your own loop, it will starve the event loop, preventing redraw requests from happening.
– Bryan Oakley
May 15 '12 at 12:54
@RyanHasse: the display only updates when Tkinter can respond to events that tell it to update the display. These events only get processed by the event loop. If you have your own loop, it will starve the event loop, preventing redraw requests from happening.
– Bryan Oakley
May 15 '12 at 12:54
add a comment |
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f10596988%2fmaking-a-countdown-timer-with-python-and-tkinter%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
here's a code example of a countdown implemented using Tkinter
– jfs
Mar 3 '15 at 9:15