Greg,
Run the following code to see how pack_forget() or
grid_forget() works, it makes previous widgets
disappear but not go away. If you call grid() or
pack() again after using grid_forget() the widget
returns.
root = Tk()
class Ktest:
def __init__(self):
self.Ftest1()
def Ftest1(self):
try:
self.test2.grid_forget()
except AttributeError :
pass
self.test1 = Button(root, text='Push #1
button', bg = 'yellow', width = 25,
command = self.Ftest2,
height = 25)
self.test1.grid(row=0, column=0)
def Ftest2(self):
self.test1.grid_forget()
self.test2 = Button(root, text='Push #2
button', bg = 'green',
width = 15,
command = self.Ftest1,
height = 10)
self.test2.grid(row=0, column=0)
if __name__== '__main__' :
Ktest()
mainloop()
Maybe someone else has an idea about not defining
a variable.
My question is how does a budket of wires and
screws know its a bucket of wires and screws
unless someone tells it that it's a bucket of
wires and screws?
On Tuesday 07 November 2006 09:35,
[EMAIL PROTECTED] wrote:
> Hi all,
>
> I'm trying to write a GUI that will put up
> multiple widgets in succession. My problem is
> that each widget also contains the previous
> widgets when they pop up. How do I reinitialize
> the widget each time so that it doesn't contain
> earlier ones? Actually, another question I have
> is, is there a way to set python so that it
> will assume any undefined variable is 0 or ''?
> That is, I have several statements like "If k >
> 0 then so and so" and I would like it to assume
> k=0 unless I tell it otherwise. I've just been
> defining k=0 at the start of the program but it
> seems there should be a better way.
>
> Greg
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