> ## 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.

# Replace `apply` With Method Call

#### Sourcery refactoring id: `replace-apply-with-method-call`

#### Description

Replace `.apply` with a call to a DataFrame's or Series's method.

#### Before

```python

df = pd.DataFrame(data={"col1": [1, 2], "col2": [3, 4]})
df.apply("sum")
```

#### After

```python

df = pd.DataFrame(data={"col1": [1, 2], "col2": [3, 4]})
df.sum()
```

#### Before

```python

series_ = pd.Series([1, 1, 2, 3, 5, 8])
series_.apply("min")
```

#### After

```python

series_ = pd.Series([1, 1, 2, 3, 5, 8])
series_.min()
```

#### Explanation

Instead of calling `apply` with an aggregation method, it's less verbose to call
the aggregation method itself.

`apply` is a versatile method, that can be used for various different use cases.
However, there's often a less verbose or more performant alternative. Try to
check out those alternatives - especially when you're working with a big
dataset.

#### Related Rule

- [replace-apply-with-numpy-operation](/reference/refactorings/python/replace-apply-with-numpy-operation/) to
  use the faster and more performant NumPy operations instead of `apply`