> ## 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.

# Avoid Builtin Shadow

#### Sourcery comment id: `avoid-builtin-shadow`

#### Description

Don't assign to builtin variables, such as `list`.

#### Before

```python
list = [1, 1, 2, 3, 5, 8]
```

#### Possible Fix

```python
fibonacci = [1, 1, 2, 3, 5, 8]
```

#### Explanation

Python has a number of `builtin` variables: functions and constants that form a
part of the language, such as `list`, `getattr`, and `type` (See
https://docs.python.org/3/library/functions.html). It is valid, in the language,
to re-bind such variables:

```python
list = [1, 2, 3]
```

However, this is considered poor practice.

- It will confuse other developers.
- It will confuse syntax highlighters and linters.
- It means you can no longer use that builtin for its original purpose.

How can you solve this?

Rename the variable something more specific, such as `integers`. In a pinch,
`my_list` and similar names are colloquially-recognized placeholders.