[Tkinter-discuss] about Tkinter delete

[Michael O'Donnell]

Dear Kristen,

   Sorry, don't know the context of your code, but I
note that you are checking if self.point1 is defined, and
if so, try to delete point1 (which is a different variable).

Also, self.point1/point1 may be defined, but may not
correspond to an existing tk widget. The error message
suggests that you are trying to delete a widget (.44593760)
which has already been deleted.

Mick

On Mon, Nov 7, 2011 at 2:26 AM, Kristen Aw <jiayuaw at yahoo.com.sg> wrote:
> Hi all
> I don't understand why I get this error. I'm trying to delete the existing
> points, then redraw them after this bit of code to 'animate' my simulation.
> def update(self, point1, point2):
>         # Deletes existing points
>         if self.point1:
>             self.w.delete(point1)
>             self.master.update_idletasks()
>         if self.point2:
>             self.w.delete(point2)
>             self.master.update_idletasks()
> #draw new point
> # . . .
> The error message that I get is:
> . . . in update
>     self.w.delete(point1)
>   File "C:\PYTHON26\LIB\LIB-TK\Tkinter.py", line 2181, in delete
>     self.tk.call((self._w, 'delete') + args)
> TclError: invalid command name ".44593760"
>
>
>
>
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