# libtmux.Server.search_sessions

- **Module:** libtmux.Server
- **Package:** libtmux
- **Language:** Python
- **Kind:** method
- **Source:** https://github.com/tmux-python/libtmux/blob/036c521c4b83ce6e434eb50afe2a0d08a6a05e46/src/libtmux/server.py#L2497
- **Page:** https://libtmux.org/reference/py/libtmux-server-search_sessions/

```
libtmux.Server.search_sessions(self, filter: str | None = None, # noqa: A002) -> QueryList[Session]
```

Sessions, optionally filtered by tmux before rows are returned.

Like :attr:`Server.sessions` but adds an optional ``filter`` kwarg
passed to ``$ tmux list-sessions -f <filter>``.

## Parameters

- `self`
- `filter` (str | None) — tmux format expression (``-f`` flag). tmux omits sessions whose
expanded expression is false before libtmux builds objects.
tmux silently expands a malformed filter (unclosed
``#{...}``, unknown format token) to empty, which the
filter treats as false — every row is suppressed and no
stderr is emitted. A bad filter is
indistinguishable from "filter matched nothing"; verify
filter syntax against the FORMATS section of ``tmux(1)``. Warning:
- `# noqa: A002`

## Returns

:class:`~libtmux._internal.query_list.QueryList` of :class:`Session`

## Example

```python
>>> server.new_session(session_name='gap7_alpha')
Session($... gap7_alpha)
>>> server.new_session(session_name='other_beta')
Session($... other_beta)
>>> matches = server.search_sessions(filter='#{m:gap7_*,#{session_name}}')
>>> [s.session_name for s in matches]
['gap7_alpha']
```