> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sourcery.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Simplify Negative Index

#### Sourcery refactoring id: `simplify-negative-index`

#### Description:

Replaces `a[len(a)-1]` with negative index lookup `a[-1]`

#### Before:

```python
a = [1, 2, 3]
last_element = a[len(a) - 1]
```

#### After:

```python
a = [1, 2, 3]
last_element = a[-1]
```

#### Explanation:

In Python you can access the end of a list by using negative indices. So
`my_list[-1]` gets the final element, `my_list[-2]` gets the penultimate one and
so on. Once you know the trick, reading code that uses it is much easier than
the alternative.