Python:list, tuple, dict, set

A list is an ordered set of elements that can be added and removed at any time.

>>> s = ['python''java', ['asp ' ' PHP ' ' Scheme ' ]>>> s[2][1]'php'

Tuple is similar to list, but a tuple cannot be modified once initialized

>>> t = ($)>>> t[2]3

Dict, which is the map in Java, is stored using key-value (Key-value).

>>> d = {'Michael'Bob'Tracy ': >>>d['Michael']95

Set is similar to Dict and is a set of keys, but does not store value. Because key cannot be duplicated, there is no duplicate key in set.

To create a set, you need to provide a list as the input collection:

>>> s = Set ([1, 2, 3])>>> s{1, 2, 3}

Python:list, tuple, dict, set