[Tkinter] Entry widget and textvariable option?

[Bob van der Poel]

Jerome Quelin wrote:
> 
> Hi all,
> 
> I can't manage to use the textvariable option in an Entry widget. And
> I can't find docs on this... And since we can't take references to
> variables in Python, I don't see how to use this feature?
> 
> When running the following code:
> 
> >>> from Tkinter import *
> >>> Entry(width=10, textvariable=spam).pack()
> 
> spam is to be defined, since Python interpolates it in the previous
> statement. And that is definitely _not_ what I want Python to do! I
> want the content of the Entry to go into the variable spam... In perl,
> I would use '\$spam' to take a reference to the variable, and in Tcl
> I'd use 'spam' to indicate a variable name, without interpolating
> it. But what should I do in Python? 'spam' interpolates the content of
> the spam variable, and we can't take variable references in Python...
> Is it that we can't use the textvariable option in Python/Tkinter?
> 
> Any help welcome.
> 
> Thanks,
> Jerome
> --
> jerome.quelin at insalien.org


This should be put into a FAQ...

The variable has to be a Tk type. So, do something like:

	spam=StringVar()

and update with

	spam.set("Monty")

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