Lists,tuples and sets of Python

Lists List

A list is an ordered sequence (collection) that can be understood as an array type in other languages, but the list is more flexible and powerful.

The list is defined by square brackets [], and its elements can be any type or object, and a list can contain mixed elements.

Cases:

x = [] Create empty list

x = [1, 2] x = [' A ', ' B '] x = [[[1, 2]] x = [{1, 2}] creates a list whose elements are of any type or object

x = [1, ' AB ', [1, 2], {1, 2},{1:1, 2:2}] Create list with mixed elements in a list

List access can be accessed through a slice or index, and the index value starts at 0, and unlike other language data, the list index can be negative, and 1 represents the last element.

x = [' A ', ' B ', ' C ']

x = [	A	' B '	C	]
Positive index	0	1	2
Negative index	-3	-2	-1

Lists,tuples and sets of Python