# libtmux._internal.sparse_array.SparseArray.append

- **Module:** libtmux._internal.sparse_array.SparseArray
- **Package:** libtmux
- **Language:** Python
- **Kind:** method
- **Source:** https://github.com/tmux-python/libtmux/blob/036c521c4b83ce6e434eb50afe2a0d08a6a05e46/src/libtmux/_internal/sparse_array.py#L116
- **Page:** https://libtmux.org/reference/py/libtmux-_internal-sparse_array-sparsearray-append/

```
libtmux._internal.sparse_array.SparseArray.append(self, value: T) -> None
```

Append a value at the next available index (max + 1).

## Parameters

- `self`
- `value` (T) — The value to append.

## Example

```python
>>> from libtmux._internal.sparse_array import SparseArray
```

## Example

Appending to an empty array starts at index 0:

```python
>>> arr: SparseArray[str] = SparseArray()
>>> arr.append("first")
>>> arr[0]
'first'
```

## Example

Appending to a non-empty array adds at max index + 1:

```python
>>> arr.add(5, "at index 5")
>>> arr.append("appended")
>>> arr[6]
'appended'
>>> arr.append("another")
>>> arr[7]
'another'
```