Python: Insert an element before each element of a list

Last update on December 21 2024 13:10:24 (UTC/GMT +8 hours)

Insert Element Before Each List Item

Write a Python program to insert an element before each element of a list.

Sample Solution:

Python Code:

# Define a list 'color' containing color names
color = ['Red', 'Green', 'Black']

# Print the original list 'color'
print("Original List: ", color)

# Use a list comprehension to create a new list 'color' by inserting the letter 'c' before each element in the original list
# This results in each color name being duplicated with 'c' added in front of it
# Print the updated list 'color'
color = [v for elt in color for v in ('c', elt)]
print("Updated List: ", color)

Sample Output:

Original List:  ['Red', 'Green', 'Black']
Updated List:  ['c', 'Red', 'c', 'Green', 'c', 'Black']

Flowchart:

Python Code Editor:

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