> ## 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.

# Yield from

#### Sourcery refactoring id: `yield-from`

#### Description:

Replaces `yield` as part of `for` loops with `yield from`

#### Before:

```python
def get_content(entry):
    for block in entry.get_blocks():
        yield block
```

#### After:

```python
def get_content(entry):
    yield from entry.get_blocks()
```

#### Explanation:

One little trick that often gets missed is that Python's `yield` keyword has a
corresponding `yield from` for collections, so there's no need to iterate over a
collection with a for loop. This makes the code slightly shorter and removes the
mental overhead and extra variable used by the for loop. Eliminating the for
loop also makes the `yield from` version about 15% faster.

Note that this cannot be done on `async` functions.