[Tutor] Why does this function execute before being called?
Alan Gauld
alan.gauld at btinternet.com
Sat Nov 7 07:36:39 EST 2015
On 07/11/15 09:28, Chris Roy-Smith wrote:
>> B4=Button(main, text='fill text', command=lambda wgt=ofield : genF(wgt))
>
> This certainly wasn't obvious from what I could find on the internet.
> Now I see an application for Lambda
I should point out you can use a def if you prefer:
def second():
main=Toplevel(root)
ofield=Text(main, height=15, width=15)
ofield.pack()
B3=Button(main, text='exit', command=main.destroy)
B3.pack()
def genFwrapper(widget = ofield): return genF(widget)
B4=Button(main, text='fill text', command=genFwrapper)
B4.pack()
The lambda just saves a line.
--
Alan G
Author of the Learn to Program web site
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