List Type Built-in Methods

In Table B.8, we present full descriptions and usage syntax for the list built-in methods given above.

Table B.8. List Type Built-in Methods

List Method	Operation
list.append(obj)	Adds obj to the end of list
list.count(obj)	Returns count of how many times obj occurs in list
list.extend(seq)[a]	Appends contents of seq to list
list.index(obj, i=0, j=len(list))	Returns lowest index k where list[k] == obj and i <= k < j; otherwise ValueError raised
list.insert(index, obj)	Inserts obj into list at offset index
list.pop(index=-1)[a]	Removes and returns obj at given or last index from list
list.remove(obj)	Removes object obj from list
list.reverse()	Reverses objects of list in place
list.sort(func=None, key=None, reverse=False)	Sorts list members with optional comparison function; key is a callback when extracting elements for sorting, and if reverse flag is true, then list is sorted in reverse order

^[a] New in Python 1.5.2.