Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Sort a list according to the Length of the Elements in Python program
We have a list of strings and our goal is to sort the list based on the length of strings in the list. We have to arrange the strings in ascending order according to their lengths. We can do this using our algorithms or Python built-in method sort() or function sorted() along with a key.
Let's take an example to see the output.
Input: strings = ["hafeez", "aslan", "honey", "appi"] Output: ["appi", "aslan", "honey", "hafeez"]
Let's write our program using sort(key) and sorted(key). Follow the below steps to achieve the desired output using a sorted(key) function.
Algorithm
1. Initialize the list of strings. 2. Sort the list by passing list and key to the sorted(list, key = len) function. We have to pass len as key for the sorted() function as we are sorting the list based on the length of the string. Store the resultant list in a variable. 3. Print the sorted list.
Example
## initializing the list of strings strings = ["hafeez", "aslan", "honey", "appi"] ## using sorted(key) function along with the key len sorted_list = list(sorted(strings, key = len)) ## printing the strings after sorting print(sorted_list)
Output
If you run the above program, you will get the following output.
['appi', 'aslan', 'honey', 'hafeez']
Algorithm
1. Initialize the list of strings. 2. Sort the list by passing key to the sort(key = len) method of the list. We have to pass len as key for the sort() method as we are sorting the list based on the length of the string. sort() method will sort the list in place. So, we don't need to store it in new variable. 3. Print the list.
Example
## initializing the list of strings strings = ["hafeez", "aslan", "honey", "appi"] ## using sort(key) method to sort the list in place strings.sort(key = len) ## printing the strings after sorting print(strings)
Output
If you run the above program, you will get the following output.
['appi', 'aslan', 'honey', 'hafeez']
Conclusion
If you have any doubts regarding the tutorial, mention them in the comment section.
Updated on: 23-Oct-2019
5K+ Views
Advertisements