[Tutor] Why does this function execute before being called?

[Alan Gauld]

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
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