append integer to beginning of list in python

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Appending Integers to the Beginning of a List in Python: A Comprehensive Guide

In Python, lists are versatile and mutable data structures that can hold elements of different data types. One common task when working with lists is to insert an element at the beginning of the list. While Python's built-in list methods provide a few ways to accomplish this, understanding the nuances and performance implications of each approach is crucial for writing efficient and maintainable code.

This tutorial will walk you through various techniques to append an integer to the beginning of a list in Python, covering their syntax, performance characteristics, and use cases. We will delve into the `insert()` method, list concatenation, list slicing, and the `collections.deque` data structure, providing clear code examples for each method.

*Understanding the Need for Appending to the Beginning*

Appending to the end of a list is a fast operation. Using `list.append()` takes constant time, O(1). However, adding an element to the beginning of a list can be more computationally expensive, especially for large lists. This is because Python lists are typically implemented as dynamic arrays in contiguous memory locations. Inserting an element at the beginning requires shifting all subsequent elements to make space, leading to a linear time complexity, O(n), where 'n' is the number of elements in the list.

Let's explore the different methods available and their trade-offs:

*1. Using the `insert()` Method*

The `insert()` method is a built-in list function that allows you to insert an element at a specific index within the list.

*Syntax:* `list.insert(index, element)`

`index`: The index where the element should be inserted. Inserting at index 0 places the element at the beginning.
`element`: The element you want to insert (in this case, an integer).

*Code Example:*



*Explanation:*

The code first initializes a list `my_list` and an ...

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