More on Lists

The list data type has some more methods. Here are all of the methods of list

objects:

The:ref:`list<typesseq-list>` data type has some more methods. Here are all

of the methods of list objects:

..method::list.append(x)

Sets

Python also includes a data type for *sets*. A set is an unordered collection

with no duplicate elements. Basic uses include membership testing and

eliminating duplicate entries. Set objects also support mathematical operations

like union, intersection, difference, and symmetric difference.

Python also includes a data type for:ref:`sets<types-set>`. A set is

an unordered collection with no duplicate elements. Basic uses include

membership testing and eliminating duplicate entries. Set objects also

support mathematical operations like union, intersection, difference, and

symmetric difference.

Curly braces or the:func:`set` function can be used to create sets. Note: to

create an empty set you have to use ``set()``, not ``{}``; the latter creates an