> ## 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.

# Comprehension to Generator

#### Sourcery refactoring id: `comprehension-to-generator`

#### Description:

Replace unneeded comprehension with generator

#### Before:

```python
hat_found = any([is_hat(item) for item in wardrobe])
```

#### After:

```python
hat_found = any(is_hat(item) for item in wardrobe)
```

#### Explanation:

Functions like `any`, `all` and `sum` allow you to pass in a generator rather
than a collection. Doing so removes a pair of brackets, making the intent
slightly clearer. It will also return immediately if a hat is found, rather than
having to build the whole list. This lazy evaluation can lead to performance
improvements.

Note that we are actually passing a generator into `any()` so strictly speaking
the code would look like this:

```python
hat_found = any((is_hat(item) for item in wardrobe))
```

but Python allows you to omit this pair of brackets.

The standard library functions that accept generators are:

```python
"all", "any", "enumerate", "frozenset", "list", "max", "min", "set", "sum", "tuple"
```