Is it not possible to have mutability without this? I know I can use sorted and list(reversed) instead of .sort and .reverse but if I want to copy a list and then change that list without changing the first one? And there isn't a .copy function so I have to "new = [] for element in list: new.append(element)" ? (I guess mutability is there for performance? Because I prefer a = sorted(a) conceptually.)
>>> a = [1,2,3] >>> b = a >>> b.append(4) >>> b [1, 2, 3, 4] >>> a [1, 2, 3, 4] >>> c = "hello" >>> d = c >>> d += " sir!" >>> c 'hello' >>> d 'hello sir!' >>> and what is the difference between extend and + on lists? -- http://mail.python.org/mailman/listinfo/python-list
