Hi Alan, Thank you for your inputs. I made the lists global in the Toplevel root. I still have the problem where in if I select few options from the first list, and then move to the next list, I loose the selections made on the screen in the first list. I can however print it out and store it in the code, but I would like to show it on the screen as well as highlighted even after moving to the next list. Can you please tell me if there is a way? Sorry about inserting the images, I was unaware of that and also regarding some of my nomenclature mistakes, still learning :)
Thank you Pooja On Thu, Feb 23, 2017 at 10:37 PM, Pooja Bhalode <poojabhalod...@gmail.com> wrote: > > ---------- Forwarded message ---------- > From: Alan Gauld via Tutor <tutor@python.org> > Date: Thu, Feb 23, 2017 at 8:51 PM > Subject: Re: [Tutor] Multiple muti-selection dropdown options > To: tutor@python.org > > > On 23/02/17 22:25, Pooja Bhalode wrote: > > > I am working on GUI where I have two dropdown menus in a Toplevel of the > > main root. > > That's not what your code shows. It shows scrolling listboxes, not > menus. But it seems like a Frame with a set of checkboxes would be > closer to what you actually want? > > Anyway... > > > The window shows as below: > > [image: Inline image 1] > > As I keep pointing out you cannot send images to this list, > the server throws them away as potential security risks. > > > Whereas the code is: > > > > def selectexp(): > > newlist = list() > > selection = lstbox.curselection() > > for i in selection: > > tempvar = lstbox.get(i) > > newlist.append(tempvar) > > > > Note that in this function you create a list, populate > it with values and then throw them all away. If you want > to keep the values you need to declare the list as a > global variable. > > > for val in newlist: > > print (val) > > Because you are not posting in plain text I can't > tell if those two lines are inside the previous > function or not. I'm assuming they are inside the > function? If not I'd expect a name error for newlist? > > > def selectexp2(): > > newlist2 = list() > > selection2 = lstbox2.curselection() > > for i in selection2: > > tempvar2 = lstbox2.get(i) > > newlist2.append(tempvar2) > > > > for val in newlist2: > > print (val) > > Same problem here, you declare newlist2 as a new > list inside the function, then when the function > exits it throws it away. If you want to access > variables after the function exits you need to > make them global (or start using classes and > objects) > > > However, the issue is that when the user selects options from the first > > dropdown menu and moves on to selecting the second one, the first > dropdown > > selections are lost, > > See comments above. Make the lists global. > > > -- > Alan G > Author of the Learn to Program web site > http://www.alan-g.me.uk/ > http://www.amazon.com/author/alan_gauld > Follow my photo-blog on Flickr at: > http://www.flickr.com/photos/alangauldphotos > > > _______________________________________________ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > https://mail.python.org/mailman/listinfo/tutor > > _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
