On Dec 21, 6:59 am, Muddy Coder <cosmo_gene...@yahoo.com> wrote: > Hi Folks, > > I was driven nuts by this thing: widgets lost their attributes, then I > can't configure them. Please take a look at the codes below:
The problem is here... > labels = [] > for i in range(len(astr)): > lbl = Label(win, text=astr[i]).pack(side=LEFT ) label.pack() returns None. So you are creating a variable named "lbl" the value of which is None. Don't believe me? Try this... >>> from Tkinter import * >>> root = Tk() >>> label = Label(root).pack() >>> label['bg'] Traceback (most recent call last): File "<pyshell#12>", line 1, in <module> label['bg'] TypeError: 'NoneType' object is not subscriptable >>> type(label) <type 'NoneType'> # # Now we separate the packing from the instancing. # >>> label = Label(root) >>> label.pack() >>> type(label) <type 'instance'> >>> label['bg'] 'SystemButtonFace' Same with list.sort. >>> lst = range(5) >>> lst [0, 1, 2, 3, 4] >>> var = lst.sort() >>> repr(var) 'None' -- http://mail.python.org/mailman/listinfo/python-list