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.
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 <[email protected]>
To: [email protected]
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.
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