I think that the version of IDLE that comes with Python doesn't run programs in their own thread. This was fixed in the version which comes with VPython, and lead to the Idle Fork. VPython: http://www.vpython.org/ Idle Fork: http://idlefork.sourceforge.net/ Note: I still do my python development with vim, not an IDE, so my comments could be way off base here. --Dethe On Thursday, February 21, 2002, at 10:07 PM, Tim Wilson wrote:

Hi everyone,

My students have used IDLE for all their editing to this point. Now we're getting to the point of playing with Tkinter a bit and I find that many, if not all, of the Tkinter apps I try don't exit cleaning and end up hanging IDLE. We're using Python 2.2 on Win95, but the same thing happend with Win98. Running the programs from the DOS shell seems to work fine.

Is this a known problem with IDLE? I'm including a short script below that exemplifies the problem. The code is from Wesley Chun's Core Python book.

from Tkinter import *

def resize(ev=None): label.config(font='Helvetica -%d bold' % scale.get())

top = Tk() top.geometry('250x150')

label= Label(top, text="Hello World!", font='Helvetica -12 bold') label.pack(fill=Y, expand=1)

scale = Scale(top, from_=10, to=40, orient=HORIZONTAL, command=resize) scale.set(12) scale.pack(fill=X, expand=1)

quit = Button(top, text="Quit", command=top.quit, activebackground='red', activeforeground='white') quit.pack()

mainloop()

Thanks for any input anyone can provide.

-Tim

-- Tim Wilson | Visit Sibley online: | Check out: Henry Sibley HS | http://www.isd197.org | http://www.zope.com W. St. Paul, MN | | http://slashdot.org wilson@visi.com | <dtml-var pithy_quote> | http://linux.com

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Is this a known problem with IDLE?

Yes. Despite of this I use IDLE with my students interactivly. Here an example session:

...

...

from Tkinter import * root = Tk() cv = Canvas(root, width=300, height=250, bg='yellow') cv.pack() cv.pack_forget() cv.pack(expand=1, fill=BOTH) from Canvas import * r = Rectangle(cv, 50,20, 250,220) k = Oval(cv, 70,40,230,200, fill='pink') l1 = Line(cv, 120,150,180,150, fill='red', width=6) l1.move(0,20) l1.coords() [120.0, 170.0, 180.0, 170.0] l2=Line(cv,150,120,160,162) l2['fill']='brown' l2['width']=4 e1=Oval(cv,110,90,140,105,fill='blue') e2=Oval(cv,159,89,191,106,fill='lightblue') k['fill']='orange'

Works fine and you can observe the construction of the graphics on the canvas. (In a similar way it's possible to add Buttons and other widgets etc.) Students (age of 15) have much fun with this approach. For them this is a way to explore Tkinter, (which is very poorly documented in German.) To turn it into a program we copy (as usual) the appropriate statements into an edit-window of IDLE and in this case we got: from Tkinter import * from Canvas import * root = Tk() cv = Canvas(root, width=300, height=250, bg='yellow') cv.pack(expand=1, fill=BOTH) r = Rectangle(cv, 50,20, 250,220) k = Oval(cv, 70,40,230,200, fill='orange') l1 = Line(cv, 120,170,180,170, fill='red', width=6) l2=Line(cv,150,120,160,162) l2['fill']='brown' l2['width']=4 e1=Oval(cv,110,90,140,105,fill='blue') e2=Oval(cv,159,89,191,106,fill='lightblue') this can be run as usual via File/Save and Edit/Run script Another Tk-window pops up and we see our graphics again. To run this program as a script one only has to add root.mainloop() Shortly this means: as long as there is no mainloop() in your script it runs correctly from IDLE. If later we want to use it as a script, we add mainloop() Hope you found this interesting Gregor Lingl