How to sort a set collection in python

Sorting a set in Python can convert the set into a list, and then sort the list through the list.sort() function. The sorting result is the sorted result of the set.

Set-->List-->list sort()

Set is an important data type in Python, representing a set of different elements An unordered collection, which is mainly used for duplicate element elimination and relationship testing.

Sets are implemented inside Python through hash tables, which are inherently disordered. The order displayed during output is random and related to the running environment.

The sort() function is used to sort the original list. If parameters are specified, the comparison function specified by the comparison function is used.

sort() method syntax:

list.sort(cmp=None, key=None, reverse=False)

Parameters

cmp -- Optional parameter, if this parameter is specified, the method of this parameter will be used for sorting.

key -- Mainly used for comparison elements, with only one parameter. The parameters of the specific function are taken from the iterable object, and an element in the iterable object is specified for sorting.

reverse -- Sorting rule, reverse = True for descending order, reverse = False for ascending order (default).

Return value:

This method has no return value, but it will sort the objects in the list.

The following example shows how to use the sort() function:

#!/usr/bin/python
# -*- coding: UTF-8 -*-

aList = [123, 'Google', 'Runoob', 'Taobao', 'Facebook'];
aList.sort();
print "List : ", aList

The output results are as follows:

List :  [123, 'Facebook', 'Google', 'Runoob', 'Taobao']

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