[Tkinter-discuss] How to make Button Command work as a called function ?

[Michael O'Donnell]

HI Bogzab,

>        def wait_a_bit():
>                topwin.iconify
>                print "Pressed No"

change the second line for:
    topwin.iconify()

You need to end a method call with () to indicate it is
an invocation. Otherwise, the statement just returns
a pointer to the method.

Mick


On Mon, Nov 2, 2009 at 10:48 PM, bogzab <bogus at bogzab.plus.com> wrote:
>
> I think I am making a rookie error with this somewhere but cannot figure out
> where.
>
> If I create a button with these lines of code :
>
>        topwin = Tk()
>        ...
>        frame = Frame(topwin)
>        ...
>        butt2 = Button(frame, text="Not yet", command=topwin.iconfiy)
>
> When the program runs, the button acts as expected and the window is
> iconified.
>
> If however the line which creates the button is :
>
>        butt2 = Button(frame, text="Not yet", command=wait_a_bit)
>
> where wait_a_bit is a function I define as follows :
>
>        def wait_a_bit():
>                topwin.iconify
>                print "Pressed No"
>
> then the print statement in this function works, but the topwin.iconify
> statement
> does not.
>
> I have tried declaring topwin to be global but this made no difference.
>
> Can anybody point me to where my error lies in the second approach ? I want
> to
> do it as a function because there are other bits of code as well as the
> iconify
> that I need to incorporate.
>
> --
> View this message in context: http://old.nabble.com/How-to-make-Button-Command-work-as-a-called-function---tp26157859p26157859.html
> Sent from the Python - tkinter-discuss mailing list archive at Nabble.com.
>
> _______________________________________________
> Tkinter-discuss mailing list
> Tkinter-discuss at python.org
> http://mail.python.org/mailman/listinfo/tkinter-discuss
>