list.append([1,2]) will add the two element list as the next element of the list.
list.extend([1,2]) is equivalent to list = list + [1, 2] and the result is that each element of the added list becomes it's own new element in the original list. Is that the only difference? >From the manual: s.extend(x) | same as s[len(s):len(s)] = x But: (python 2.5.2) >>> a [1, 2, 3] >>> a[len(a):len(a)] = 4 Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: can only assign an iterable >>> Also, what is the difference between list[x:x] and list[x]? >>> a[3:3] = [4] >>> a [1, 2, 3, 4] ** Posted from http://www.teranews.com ** -- http://mail.python.org/mailman/listinfo/python-list
