> ## 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.

# Lift Duplicated Conditional

#### Sourcery refactoring id: `lift-duplicated-conditional`

#### Description:

Lift repeated conditional into its own `if` statement

#### Before:

```python
if isinstance(hat, Sombrero) and hat.colour == "green":
    wear(hat)
elif isinstance(hat, Sombrero) and hat.colour == "red":
    destroy(hat)
```

#### After:

```python
if isinstance(hat, Sombrero):
    if hat.colour == "green":
        wear(hat)
    elif hat.colour == "red":
        destroy(hat)
```

#### Explanation:

Duplicating conditions in an `if` statement makes things more difficult to read,
and carries with it all the usual problems of code duplication. While normally
we try to avoid adding nesting to the code, in this case it makes sense to lift
the duplicated conditional into its own `if` statement.

It is now clearer at a glance that the whole `if..elif` chain relates only to
sombreros and not other types of hat.

See also: [`hoist-repeated-if-condition`](/reference/refactorings/python/hoist-repeated-if-condition/), the
related refactoring for repeated `if` blocks.