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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