add element to front of list in python

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Okay, let's dive deep into adding elements to the front of a list in Python. This is a common operation in programming, and understanding the different methods and their performance implications is crucial for writing efficient code.

**Understanding Lists in Python**

Before we start, let's briefly review what lists are in Python. Lists are ordered, mutable (changeable) collections of items. This means:

* **Ordered:** The elements have a specific sequence, and the order is maintained.
* **Mutable:** You can add, remove, or change elements within a list after it's created.
* **Heterogeneous:** Lists can hold elements of different data types (e.g., integers, strings, other lists).
* **Indexed:** Each element can be accessed using its index (position), starting from 0 for the first element.

**Methods for Adding Elements to the Front of a List**

There are several ways to add an element to the beginning of a Python list. Each method has its own characteristics and performance considerations. Let's examine them in detail:

**1. `list.insert(0, element)`**

The `insert()` method is a built-in list method designed specifically for inserting an element at a specific index within the list. The syntax is `list.insert(index, element)`, where:

* `index`: The index at which you want to insert the element. In this case, we use `0` to insert at the very beginning.
* `element`: The element you want to add to the list.
**Explanation:**

* `my_list.insert(0, element_to_add)` modifies the `my_list` in place. It shifts all the existing elements to the right to make space for the new element at index 0.

**Performance:**

* **Time Complexity: O(n)** (where n is the number of elements in the list). This is because inserting at the beginning requires shifting all existing elements one position to the right. This becomes less efficient as the list grows larger.
* **Space Complexity: O(1)** (constant space). `insert()` operates in place, so it doesn't create a ...

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