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Changing global variables in tkinter/pmw callback

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"Brian Elmegaard" <be at mek.dtu.dk> wrote in messagenews:3AD41D9A.42361F21 at mek.dtu.dk...>> > Which would become, to be literal in the transliteration:> >> >     def configure_command(self=self, button=button,> >             buttons=self.buttons, setting=CurrentCanvasSetting):> >         self.apply(button, buttons, setting)> >> >     button.configure(command = configure_command)>> So that's the way. I see.It's ONE way -- I, personally, tend to find it morereadable than lambda, but personal taste matters here.> > Here, if I understand correctly, what you're trying to do> > is somehow set an appropriate "global" string when a> > function is executed.  If that CurrentCanvasSetting is>> yes.> >> >     def apply(self, button, modobj, varname):> >         setattr(modobj, varname, button.cget('text'))>> Ahh. But still it's not really like assigning to a global...Why not?  If modobj is the module object of the currentmodule, the semantics of setattr are EXACTLY identicalto (say variable varname's value is string 'foo'):    global foo    foo = button.cget('text')or, for more general (and arbitrary) values of modobj,    modobj.foo = button.cget('text')So, it is EXACTLY "really like assigning to a global".Are you troubled by using setattr's "function-call"syntax sugar to effect this binding, rather than the"assignment-statement" syntax sugar?  You COULD mimicthe setattr by dynamically building up an assignmentstatement in a string then executing it...:    statement = modobj+'.'+varname+'=button.cget("text")'    exec statement...but I don't see why anybody would prefer suchconvoluted obfuscation to setattr's simplicity.Alex

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