> ## 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.

# DataFrame Append to Concat

#### Sourcery suggestion id: `dataframe-append-to-concat`

Available starting with version 1.1.0

#### Description

Use `pandas.concat()` instead of the deprecated `DataFrame.append()`.

#### Before

```python

df = pd.DataFrame(
    [
        ["Python", 190],
        ["JavaScript", 33],
    ],
    columns=["Language", "Number of rules"],
)
other = pd.DataFrame([{"Language": "Java", "Number of rules": 5}])

df.append(other)
```

#### After

```python

df = pd.DataFrame(
    [
        ["Python", 190],
        ["JavaScript", 33],
    ],
    columns=["Language", "Number of rules"],
)
other = pd.DataFrame([{"Language": "Java", "Number of rules": 5}])

pd.concat([df, other])
```

#### Explanation

`pandas.DataFrame.append()` has been deprecated.

Use
[`pandas.concat()`](https://pandas.pydata.org/docs/reference/api/pandas.concat.html)
instead.

See the
[DataFrame docs](https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.append.html)