> ## 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 Comparisons

#### Sourcery refactoring id: `merge-comparisons`

#### Description:

Consolidates multiple comparisons into a single comparison

#### Before:

```python
def process_payment(payment):
    if payment.currency == "USD" or payment.currency == "EUR":
        process_standard_payment(payment)
    else:
        process_international_payment(payment)
```

#### After:

```python
def process_payment(payment):
    if payment.currency in ["USD", "EUR"]:
        process_standard_payment(payment)
    else:
        process_international_payment(payment)
```

#### Explanation:

We often have to compare a value to one of several possible others. When written
out like the 'Before' example we have to look through each comparison to
understand it, as well as mentally processing the boolean operator.

By using the `in` operator and moving the values we are comparing to into a
collection we can simplify things.

This has avoided a little bit of duplication, and the conditional can now be
taken in and understood with one glance.