On Jul 11, 11:34 pm, Denis Kasak <[EMAIL PROTECTED]> wrote: > On Sat, Jul 12, 2008 at 12:22 AM, kdt <[EMAIL PROTECTED]> wrote: > > > Hi all, > > > > Can someone please explain to me why the following evaluates as false? > > > >>>>list=['a','n','n','a'] > >>>>list==list.reverse() > >>>>False > > > > I'm stumped :s > > Read the documentation on list.reverse(). > > Basically, it reverses the list in place, so it modifies the list which > called it. It does not return a /new/ list which is a reversed version > of the original, as you expected it to. Since it doesn't return anything > explicitly, Python makes it return None. Hence, the comparison you are > doing is between the original list and a None, which is False, naturally. > Try this: > > spam = ['a', 'n', 'n', 'a'] > eggs = spam[:] > if spam.reverse() == eggs: > print "Palindrome" > > Also, 'list' is a really bad name for a list, since this is the name of > the builtin type object for the list type. > > -- > Denis Kasak
thanks for the explanation :D -- http://mail.python.org/mailman/listinfo/python-list
