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
Adding value to sublists in Python
Sometimes we need to introduce an additional value to an already existing list. In this article we will see how the new value or values can be inserted into an already existing list by combining with each item of the existing list.
Using For Loop
If we take a list which has items of the same length, we can use this method to introduce new values in each of the item of the list. In the below example we are taking a list of
Example
List = [[10, 20], [14, 8],['Mon','Tue']]
print("Given List: \n" + str(List))
s = "Rise"
t = "fast"
result = [[m, n, s,t ] for m, n in List]
#result
print("\nNew List: \n" + str(result))Running the above code gives us the following result
Output
Given List: [[10, 20], [14, 8], ['Mon', 'Tue']] New List: [[10, 20, 'Rise', 'fast'], [14, 8, 'Rise', 'fast'], ['Mon', 'Tue', 'Rise', 'fast']]
Using + Operator
The + operator when used with a list simply adds new elements to each of the list items. In the below example we find that even a list itself can be used as a new element to be added to the existing lift. Also the existing elements in the list can be of varying length.
Example
List = [[1.5, 2.5, 'Tue'], [0.8, 0.9, 'Ocean'], [6.8, 4.3], [9]]
print("Given List: \n" + str(List))
# Choose a list to be added.
s = ["Rise","Fast"]
result = [sub + [s] for sub in List]
print("\nNew List: \n" + str(result))Running the above code gives us the following result
Output
Given List: [[1.5, 2.5, 'Tue'], [0.8, 0.9, 'Ocean'], [6.8, 4.3], [9]] New List: [[1.5, 2.5, 'Tue', ['Rise', 'Fast']], [0.8, 0.9, 'Ocean', ['Rise', 'Fast']], [6.8, 4.3, ['Rise', 'Fast']], [9, ['Rise', 'Fast']]]
684 Views
