# libtmux._internal.sparse_array.SparseArray.append

- **Module:** libtmux._internal.sparse_array
- **Package:** libtmux
- **Language:** Python
- **Kind:** method
- **Source:** https://github.com/tmux-python/libtmux/blob/38e368c11117fb4aeb2f082d552cd4f210eae06a/src/libtmux/_internal/sparse_array.py#L116
- **Page:** https://libtmux.org/en/py/stable/reference/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).

## Examples

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

Appending to an empty array starts at index 0:

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

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'
```

## Type parameters

- [`T`](/en/py/stable/reference/libtmux-_internal-sparse_array-sparsearray/#libtmux._internal.sparse_array.SparseArray.type-parameter.T), declared by [`SparseArray<T>`](/en/py/stable/reference/libtmux-_internal-sparse_array-sparsearray/)

## Parameters

- `value` (`T`): The value to append.