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Python – Sort Matrix by total characters
• Last Updated : 11 Oct, 2020

Given a String Matrix, sort by total data, i.e total characters in each row.

Input : test_list = [[“Gfg”, “is”, “Best”], [“Geeksforgeeks”, “Best”], [“ILvGFG”]]
Output : [[‘ILvGFG’], [‘Gfg’, ‘is’, ‘Best’], [‘Geeksforgeeks’, ‘Best’]]
Explanation : 6 < 11 < 17 total characters respectively after sorting.

Input : test_list = [[“Geeksforgeeks”, “Best”], [“ILvGFG”]]
Output : [[‘ILvGFG’], [‘Geeksforgeeks’, ‘Best’]]
Explanation : 6 < 17 total characters respectively after sorting.

Method #1 : Using sort() + len() + sum()

In this, we perform task of sorting using sort(), and task of getting total characters is done using len() and sum().

## Python3

 `# Python3 code to demonstrate working of``# Sort Matrix by total characters``# Using sort() + len() + sum()`` ` ` ` `def` `total_chars(row):`` ` `    ``# getting total characters``    ``return` `sum``([``len``(sub) ``for` `sub ``in` `row])`` ` ` ` `# initializing list``test_list ``=` `[[``"Gfg"``, ``"is"``, ``"Best"``], [``"Geeksforgeeks"``, ``"Best"``],``             ``[``"GFg"``, ``"4"``, ``"good"``], [``"ILvGFG"``]]`` ` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))`` ` `# calling utility fnc``test_list.sort(key``=``total_chars)`` ` `# printing result``print``(``"Sorted results : "` `+` `str``(test_list))`

Output:

The original list is : [[‘Gfg’, ‘is’, ‘Best’], [‘Geeksforgeeks’, ‘Best’], [‘GFg’, ‘4’, ‘good’], [‘ILvGFG’]]
Sorted results : [[‘ILvGFG’], [‘GFg’, ‘4’, ‘good’], [‘Gfg’, ‘is’, ‘Best’], [‘Geeksforgeeks’, ‘Best’]]

Method #2 : Using sorted() + lambda

In this, sorted() is used to get the sorted result and the lambda function is used inplace of external function to get the logic of sorting strings.

## Python3

 `# Python3 code to demonstrate working of ``# Sort Matrix by total characters ``# Using sorted() + lambda`` ` `# initializing list``test_list ``=` `[[``"Gfg"``, ``"is"``, ``"Best"``], [``"Geeksforgeeks"``, ``"Best"``],``             ``[``"GFg"``, ``"4"``, ``"good"``], [``"ILvGFG"``]]`` ` `# printing original list``print``(``"The original list is : "` `+` `str``(test_list))`` ` `# sorted() gives sorted result ``# lambda function providing logic``res ``=` `sorted``(test_list, key ``=` `lambda` `row : ``sum``([``len``(sub) ``for` `sub ``in` `row]))`` ` `# printing result ``print``(``"Sorted results : "` `+` `str``(res))`

Output:

The original list is : [[‘Gfg’, ‘is’, ‘Best’], [‘Geeksforgeeks’, ‘Best’], [‘GFg’, ‘4’, ‘good’], [‘ILvGFG’]]

Sorted results : [[‘ILvGFG’], [‘GFg’, ‘4’, ‘good’], [‘Gfg’, ‘is’, ‘Best’], [‘Geeksforgeeks’, ‘Best’]]

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