List expansion by K in Python

In this article, we are going to learn how to expand the list by replicating the element K times. We'll two different ways to solve the problem.

Follow the below steps to solve the problem.

• Initialize the list, K, and an empty list.
• 3Iterate over the list and add current element K times using replication operator.
• Print the result.

Example

Let's see the code.

 Live Demo

# initializing the list
numbers = [1, 2, 3]
K = 5

# empty list
result = []

# expanding the list
for i in numbers:
   result += [i] * K

# printing the list
print(result)

If you run the above code, then you will get the following result.

Output

[1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3]

Follow the below steps to solve the problem.

• Initialize the list and K.
• Iterate over the list and add current element K times using an inner loop.
• Print the result.

Example

Let's see the code.

 Live Demo

# initializing the list
numbers = [1, 2, 3]
K = 5

# expanding the list
result = [i for i in numbers for j in range(K)]

# printing the list
print(result)

If you run the above code, then you will get the following result.

Output

[1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3]

Conclusion

If you have any queries in the article, mention them in the comment section.

Hafeezul Kareem

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Updated on: 13-Nov-2020

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