[Tkinter] event problem

[Ivan Letal]

I have just tried this code..

Tkinter import *

root = Tk()

def callback(event) :
print "clicked at", event.x, event.y

frame = Frame(root, width=100, height=100)
frame.bind("<Bu tton-1>", callback)
frame.pack()
root.mainloop()

... on my SuSE Linux 8.2, Python 2.2.2, python-tk 2.2.2.

This opens a new window, but there is a problem when I click on it. I
tried similar code where clicking on a button does the same. Can anyone
help?

Here is the error:

Exception in Tkinter callback
Traceback (most recent call last):
File
"/var/tmp/python-2.2.2-build//usr/lib/python2.2/lib-tk/Tkinter.py", line
1299, in __call__
args = apply(self.subs t, args)
File
"/var/tmp/python-2.2.2-build//usr/lib/python2.2/lib-tk/Tkinter.py", line
1035, in _substitute
e.height = getint(h)
ValueError: invalid literal for int(): ??

[Peter Otten]

Re: [Tkinter] event problem

Ivan Letal wrote:
[color=blue]
> I have just tried this code..
>
> Tkinter import *
>
> root = Tk()
>
> def callback(event) :
> print "clicked at", event.x, event.y
>
> frame = Frame(root, width=100, height=100)
> frame.bind("<Bu tton-1>", callback)
> frame.pack()
> root.mainloop()
>
> .. on my SuSE Linux 8.2, Python 2.2.2, python-tk 2.2.2.
>
> This opens a new window, but there is a problem when I click on it. I
> tried similar code where clicking on a button does the same. Can anyone
> help?
>
> Here is the error:
>
> Exception in Tkinter callback
> Traceback (most recent call last):
> File
> "/var/tmp/python-2.2.2-build//usr/lib/python2.2/lib-tk/Tkinter.py", line
> 1299, in __call__
> args = apply(self.subs t, args)
> File
> "/var/tmp/python-2.2.2-build//usr/lib/python2.2/lib-tk/Tkinter.py", line
> 1035, in _substitute
> e.height = getint(h)
> ValueError: invalid literal for int(): ??[/color]


No problems with your code here (Suse 8.1, Python 2.3).

The relevant portion of 2.3's Tkinter.py has an interesting comment together
with what seems to be a Tk workaround:

[...]
def _substitute(sel f, *args):
"""Internal function."""
if len(args) != len(self._subst _format): return args
getboolean = self.tk.getbool ean

getint = int
def getint_event(s) :
"""Tk changed behavior in 8.4.2, returning "??" rather more
often."""
try:
return int(s)
except ValueError:
return s
[...]

So, if that's an option, upgrading to 2.3 should solve your problem.

Peter

[Peter Otten]

Re: [Tkinter] event problem

Ivan Letal wrote:
[color=blue]
> I have just tried this code..
>
> Tkinter import *
>
> root = Tk()
>
> def callback(event) :
> print "clicked at", event.x, event.y
>
> frame = Frame(root, width=100, height=100)
> frame.bind("<Bu tton-1>", callback)
> frame.pack()
> root.mainloop()
>
> .. on my SuSE Linux 8.2, Python 2.2.2, python-tk 2.2.2.
>
> This opens a new window, but there is a problem when I click on it. I
> tried similar code where clicking on a button does the same. Can anyone
> help?
>
> Here is the error:
>
> Exception in Tkinter callback
> Traceback (most recent call last):
> File
> "/var/tmp/python-2.2.2-build//usr/lib/python2.2/lib-tk/Tkinter.py", line
> 1299, in __call__
> args = apply(self.subs t, args)
> File
> "/var/tmp/python-2.2.2-build//usr/lib/python2.2/lib-tk/Tkinter.py", line
> 1035, in _substitute
> e.height = getint(h)
> ValueError: invalid literal for int(): ??[/color]


No problems with your code here (Suse 8.1, Python 2.3).

The relevant portion of 2.3's Tkinter.py has an interesting comment together
with what seems to be a Tk workaround:

[...]
def _substitute(sel f, *args):
"""Internal function."""
if len(args) != len(self._subst _format): return args
getboolean = self.tk.getbool ean

getint = int
def getint_event(s) :
"""Tk changed behavior in 8.4.2, returning "??" rather more
often."""
try:
return int(s)
except ValueError:
return s
[...]

So, if that's an option, upgrading to 2.3 should solve your problem.

Peter

[Russell E. Owen]

Re: [Tkinter] event problem

In article <bks0va$9mv$1@n s.felk.cvut.cz> ,
Ivan Letal <admin4055@cent rum.cz> wrote:
[color=blue]
>I have just tried this code....
>Here is the error:
>
>Exception in Tkinter callback
>Traceback (most recent call last):
> File
>"/var/tmp/python-2.2.2-build//usr/lib/python2.2/lib-tk/Tkinter.py", line
>1299, in __call__
> args = apply(self.subs t, args)
> File
>"/var/tmp/python-2.2.2-build//usr/lib/python2.2/lib-tk/Tkinter.py", line
>1035, in _substitute
> e.height = getint(h)
>ValueError: invalid literal for int(): ??[/color]

I think you are running mutually incompatible versions of Python and Tk.
Python 2.2.2 and earlier need Tk 8.4.1 or earlier. Python 2.3 is
compatible with later versions of Tk.

-- Russell