Python extend()

The extend() method adds multiple elements to the right end of a deque from any iterable (like a list, tuple, or another deque). It modifies the deque in place and returns None.

Syntax

deque.extend(iterable)

Parameters:

• iterable: A sequence or iterable whose elements will be added to the right end of the deque.

Return value:

This method does not return any value. It modifies the deque in-place.

Example

In this example, extend() adds elements from a list and another deque to the right end of a deque:

from collections import deque

# Create a deque
dq = deque([1, 2, 3])

# Extend it
dq.extend([4, 5, 6])
print("Extending with list: ", dq)

#Extend it using another deque
dq.extend(deque([7, 8, 9]))
print("Extending with another deque: ", dq)

Copy to clipboard
Copy to clipboard

This example results in the following output:

Extending with list: deque([1, 2, 3, 4, 5, 6])
Extending with another deque: deque([1, 2, 3, 4, 5, 6, 7, 8, 9])

Copy to clipboard
Copy to clipboard

Codebyte Example: Extending a deque with a list and a tuple

In this example, extend() adds elements from a list and a tuple, demonstrating its ability to handle different iterables:

Visit us
Visit us
Hide code
Code
Output
Hide output
Loading...
Copy to your clipboard
Copy Codebyte
Run