> ## 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.

# Merge Set Add

#### Sourcery refactoring id: `merge-set-add`

#### Description:

Create the set with values instead of declaring an empty set and adding to it

#### Before:

```python
hats_i_own = set()
hats_i_own.add("panama")
hats_i_own.add("baseball_cap")
hats_i_own.add("bowler")
```

#### After:

```python
hats_i_own = {"panama", "baseball_cap", "bowler"}
```

#### Explanation:

When declaring a set and filling it up with values one way that can come
naturally is to declare it as empty and then add to it.

This can be done in place, shortening the code and making the intent more
explicit. Now I just need to glance at one line to see that I'm filling a
variable with hats, rather than four.

Doing it this way is also slightly more performant since it avoids the function
calls to `add`. The same holds true for filling up other collection types like
lists and dictionaries.