Michael Lange wrote: >> ---------- Forwarded message ---------- >> Date: Fri, 4 Aug 2006 09:32:48 -0700 (PDT) >> From: Michael Cochez <[EMAIL PROTECTED]> >> To: [EMAIL PROTECTED] >> Subject: Multiple buttons, One callback >> >> Hi Danny, >> I've just been reading your reply on this subject at >> http://mail.python.org/pipermail/tutor/2005-September/041358.html >> about a year ago. >> I need something like this but also something more: >> I'm making an app with an interface that is going to >> look like in the added image. The "=" buttons are >> there to copy the contents of the previous lines to >> the current line. >> To make the buttons tried a lot of things but the >> problem is: the number of buttons is always different >> (one less as the number of day) so it can be none or >> 20 or something else. So i putted the creation in a >> for loop. >> But now the real problem: every button must have its >> own callback(because the linenumber is different) So >> my question is: how can I give each button its 'own' >> callback while only having one (the callbacks are all >> the same but with another value of linenumber. I added >> a piece of the code to show what i mean. >> > > I would use a lambda for this, like: > > > def makeidentical(linenumber): > > print "the linenumber is: %d" % (linenumber) > > > for day in datelist: > > a=datelist.index(day) > > if a>0:#on every line exept the first > > identicalbutton=Button(frame2,text="=",command=lambda : > makeidentical(a)) > You have to bind the current value of a in the lambda, otherwise all the callbacks will use the final value of a. One way to do this is with a default argument to the lambda:
identicalbutton=Button(frame2,text="=",command=lambda a=a : makeidentical(a)) Another way is with a separate function such as make_callback in the original post. Kent > > _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
