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Date: Mon, 16 May 2011 22:24:34 -0700
Subject: Re: indirect assignment question
From: Chris Rebert <clp2@rebertia.com>
To: Andy Baxter <highfellow@gmail.com>
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On Mon, May 16, 2011 at 10:13 PM, Andy Baxter <highfellow@gmail.com> wrote:
> Hi,
>
> I have some lines of code which currently look like this:
>
> =C2=A0 =C2=A0 =C2=A0self.window =3D self.wTree.get_widget("mainWindow")
> =C2=A0 =C2=A0 =C2=A0self.outputToggleMenu =3D self.wTree.get_widget("menu=
item_output_on")
> =C2=A0 =C2=A0 =C2=A0self.outputToggleButton =3D self.wTree.get_widget("bu=
tton_toggle_output")
> =C2=A0 =C2=A0 =C2=A0self.logView =3D self.wTree.get_widget("textview_log"=
)
> =C2=A0 =C2=A0 =C2=A0self.logScrollWindow =3D self.wTree.get_widget("scrol=
ledwindow_log")
>
> and I would like (for tidiness / compactness's sake) to replace them with
> something like this:
> =C2=A0 =C2=A0 =C2=A0 =C2=A0widgetDic =3D {
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 "mainWindow": self.window,
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 "menuitem_output_on": self.outputToggl=
eMenu,
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 "button_toggle_output": self.outputTog=
gleButton,
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 "textview_log": self.logView,
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 "scrolledwindow_log": self.logScrollWi=
ndow
> =C2=A0 =C2=A0 =C2=A0 =C2=A0}
> =C2=A0 =C2=A0 =C2=A0 =C2=A0for key in widgetDic:
> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ... set the variable in dic[key] to po=
int to
> self.wTree.get_widget(key) somehow
>
> what I need is some kind of indirect assignment where I can assign to a
> variable whose name is referenced in a dictionary value.
>
> Is there a way of doing this in python?

You can achieve almost the same level of brevity, with less use of
magic, by simply using a local variable to refer to
self.wTree.get_widget:

w =3D self.wTree.get_widget # or choose some other similarly short variable=
 name
self.window =3D w("mainWindow")
self.outputToggleMenu =3D w("menuitem_output_on")
self.outputToggleButton =3D w("button_toggle_output")
self.logView =3D w("textview_log")
self.logScrollWindow =3D w("scrolledwindow_log")

Python functions/methods are first-class; exploit this feature!

Cheers,
Chris
--
http://rebertia.com