Il Sun, 13 Dec 2009 16:37:20 +0000, mattia ha scritto: > How can I insert non-duplicate data in a list? I mean, is there a > particular option in the creation of a list that permit me not to use > something like: > def append_unique(l, val): > if val not in l: > l.append(val) > > Thanks, > Mattia
Ok, so you all suggest to use a set. Now the second question, more interesting. Why can't I insert a list into a set? I mean, I have a function that returns a list. I call this function several times and maybe the list returned is the same as another one already returned. I usually put all this lists into another list. How can I assure that my list contains only unique lists? Using set does'n work (i.e. the python interpreter tells me: TypeError: unhashable type: 'list')... -- http://mail.python.org/mailman/listinfo/python-list
