Phil wrote: > On Sat, 08 Apr 2017 09:12:17 +0200 > Peter Otten <__pete...@web.de> wrote: > > Thank you yet again Peter. > > I realised what the answer is after taking a break for a couple of hours, > however, I didn't know about: > >> ... >> self.check_button = Button( >> master, >> text="Check", >> command=self.check_2_2 # note there's no () -- the bound >> method # is not invoked >> ) >> ... >> > > My working method uses the ()
This is unlikely unless you have found out about factory methods (functions that return functions). > but I will remove them and see what > difference it makes. Make sure you understand the difference between calling a function and passing around a function as a value. def f(): return 42 a = f b = f() You have understood the difference if you can predict the outcome of all four lines below: print(a) print(b) print(a()) print(b()) Once you think you know the answer try it in the interactive interpreter. _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
