Now I understand what I misunderstood. Well he imported Tkinter as tk, so I thought if it belonged to Tkinter it would be tk.after(), but the after was attached to the app, so it was in actuality app.after() . app inherits from the tk class (taking with it all its methods), so its a built in function of tkinter.
I read the whole thread of the first google response, but I still wasn't sure if it was a Tkinter function or a python function. I searched the actual python documentation quite extensively, but briefly glanced at the tkinter effbot page, after not seeing it I came here. I was just looking for the documentation on after(). But yea, this is what I needed id = w.after(time, callback) So I know it takes 2 arguments, and I know to use it recursively in my problem, so now I understand enough about this function to put it to good use :) Thank you. ---- What is it about you... that intrigues me so? ________________________________ From: Wayne Werner <waynejwer...@gmail.com> To: michael scott <jigenbak...@yahoo.com> Cc: tutor@python.org Sent: Mon, April 25, 2011 9:15:10 PM Subject: Re: [Tutor] after(), how do I use it? On Mon, Apr 25, 2011 at 8:02 PM, michael scott <jigenbak...@yahoo.com> wrote: Here is the code in its entirety, it works although I don't see after() defined, so I assumed it was a built in function. I can just copy and paste parts of this code into my project, so its not imperative that I understand, but I prefer to use the weapons I've been given. So I hope that you guys can understand it a bit better after I post this. > That it is indeed. Do you understand classes and subclassing in Python? App is a subclass of tk.Tk. If you have done any of your own programming in Tkinter, you should know that Tk is the "main" class in Tkinter. If you do a Google search for "Tkinter after", the top two results will answer your question: http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=tkinter+after HTH, Wayne >import Tkinter as tk > >class App(tk.Tk): > def __init__(self,*args, **kwargs): > tk.Tk.__init__(self, *args, **kwargs) > self.label = tk.Label(self, text="", width=20, anchor="w") > self.label.pack(side="top",fill="both",expand=True) > self.print_label_slowly("Hello, world!") > > > def print_label_slowly(self, message): > '''Print a label one character at a time using the event loop''' > t = self.label.cget("text") > t += message[0] > self.label.config(text=t) > if len(message) > 1: > self.after(500, self.print_label_slowly, message[1:]) > >app = App() >app.mainloop() > > > > ---- >What is it about you... that intrigues me so? > > > > > ________________________________ From: Adam Bark <adam.jt...@gmail.com> >To: tutor@python.org >Sent: Mon, April 25, 2011 8:50:16 PM >Subject: Re: [Tutor] after(), how do I use it? > > >On 26/04/11 01:36, michael scott wrote: >> Hello, I asked for help in another location and it solved my problem, but >> the >>only problem is I don't fully understand the after function. Here is part of >>the >>code that was given to me. >> >> >> def print_label_slowly(self, message): >> '''Print a label one character at a time using the event loop''' >> t = self.label.cget("text") >> t += message[0] >> self.label.config(text=t) >> if len(message) > 1: >> self.after(500, self.print_label_slowly, message[1:]) >> >> I understand it, and the gist of how it works, but the self.after... I can >> not >>find any documentation on it (because after is such a common word), so can >>you >>guys tell me how it works. Is this a built in function (didn't see it on the >>built in function list)? Does it always take 3 arguements? Is this a user >>made >>function and I'm just overlooking where it was defined at? > >The function you have shown there appears to be a class method. self.after >means >you are calling another method of the same function that print_label_slowly is >a >part of. >Do you have the rest of the code? If you're still confused post it and >hopefully >we can clear it up for you. > >HTH, >Adam. >_______________________________________________ >Tutor maillist - Tutor@python.org >To unsubscribe or change subscription options: >http://mail.python.org/mailman/listinfo/tutor > >_______________________________________________ >Tutor maillist - Tutor@python.org >To unsubscribe or change subscription options: >http://mail.python.org/mailman/listinfo/tutor > >
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