Kevin Walzer wrote:
> I'm trying to manage user preferences in a Tkinter application by
> initializing some values that can then be configured from a GUI. The
> values are set up as a dict, like so:
>
> self.prefs= {
> 'interface': '-en1',
> 'verbose': '-v',
> 'fontname': 'Courier',
> 'point': 12,
> }
>
> To link these values to the appropriate Tkinter variables, I'm using
> code like this:
>
> self.prefs['interface'] = StringVar()
> self.prefs['interface'].set("-en0") # initialize
>
> This raises an error in Tkinter:
>
> Exception in Tkinter callback
> Traceback (most recent call last):
> File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py",
>
> line 1403, in __call__
> return self.func(*args)
> File "/Users/kevin/Programming/packetstream/packetstream-classes.py",
> line 293, in setPrefs
> self.prefs['interface'] = StringVar()
> File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/lib-tk/Tkinter.py",
>
> line 3237, in __setitem__
> self.tk.call(self.name, 'configure', '-'+key, value)
> TclError: unknown option "-interface"
>
> Can someone help me smooth this out--to get dict key-values into a
> Tkinter variable like StringVar()?
>
> Thanks.
>
I overlooked this latter question.
Probably, your naming confusion above with self.prefs and the resulting
errors obscure your intention. But, were I to keep a dictionary of
StringVars for prefs, I would initialize it in this manner:
# somewhere in self
defaults = {
'interface' : '-en1',
'verbose' : '-v',
'fontname' : 'Courier',
'point' : 12
}
self.prefs = dict((d,StringVar()) for d in defaults)
for d in defaults:
self.prefs[d].set(defaults[d])
Note, of course, that you will need to access 'point' like this if you
want it back as an int:
int(self.prefs['point'].get())
Because StringVars return strings from their get() method.
James
--
James Stroud
UCLA-DOE Institute for Genomics and Proteomics
Box 951570
Los Angeles, CA 90095
http://www.jamesstroud.com/
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