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  1. Rotating a list in Python involves shifting its elements to the left or right by a specified number of positions. Below are some efficient methods to achieve this:

    1. Using Slicing

    Slicing is a simple and efficient way to rotate a list.

    # Rotate list using slicing
    numbers = [1, 2, 3, 4, 5]
    k = 2 # Number of positions to rotate
    rotated_list = numbers[-k:] + numbers[:-k]
    print(rotated_list)
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    Output: [4, 5, 1, 2, 3]

    2. Using collections.deque

    The deque object from the collections module provides a built-in rotate() method for efficient rotation.

    from collections import deque

    # Rotate list using deque
    numbers = [1, 2, 3, 4, 5]
    k = 2
    deque_list = deque(numbers)
    deque_list.rotate(k) # Positive k rotates right; negative k rotates left
    rotated_list = list(deque_list)
    print(rotated_list)
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    Output: [4, 5, 1, 2, 3]

    3. Using pop() and insert()

    This method is suitable for small lists and involves manually moving elements.

    # Rotate list using pop and insert
    numbers = [1, 2, 3, 4, 5]
    k = 2
    for _ in range(k):
    last_element = numbers.pop()
    numbers.insert(0, last_element)
    print(numbers)
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  1. Efficient way to rotate a list in python - Stack Overflow

    Aug 3, 2019 · The real correct answer, is you should never be rotating the list in the first place. Create a "pointer" variable to the logical place in your list where you want the "head" or "tail" to be, and change …

    • Reviews: 7

      Code sample

      items = deque([1, 2])
      items.append(3) # deque == [1, 2, 3]
      items.rotate(1) # The deque is now: [3, 1, 2]
      items.rotate(-1) # Returns deque to original state: [1, 2, 3]
      item = items.popleft() # deque == [2, 3]...
    • How to shift (rotate) a List in Python [5 Ways] - bobbyhadz

      • You can use list slicing to shift (rotate) a list in Python: 1. Take a slice of the list from index 1to the end. 2. Add a slice of the list starting at index 0 and going up to, but notincluding index 1. The example moves the first list item to the back of the list. If you need to move the last list item to the front of the list, use thefollowing co...
      See more on bobbyhadz.com
    • How to Shift and Rotate Lists in Python | Tutorial Reference

      Shifting (or rotating) a list involves moving elements to the beginning or end, wrapping them around as if the list were circular. This guide explores various methods for shifting lists in Python, including list …

    • How to Rotate a List in Python - Tutorial Kart

      To rotate a list in Python, we can use slicing, the collections.deque module, the pop() and insert() methods, or list comprehensions. Rotation involves shifting elements to the left or right while maintaining the order of elements in a cyclic …

    • 4 Easy Ways to Rotate lists in Python - AskPython

      Nov 23, 2021 · Hey Folks! Today in this tutorial, we will learn how one can rotate a list using the python programming language. List rotation is a simple method that comes in helpful for programmers. Let’s go over various options for achieving …

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    • How to rotate a list in Python - CodeSpeedy

      These are five easy methods to rotate a given list in Python. We can rotate a list in Python using 5 different methods. It includes using an in-built funtion, by traversing, slicing, list comprehensions.