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⚙️ python api for tmux
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libtmux - scripting library for tmux

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libtmux is the tool behind tmuxp, a tmux workspace manager in python.

it builds upon tmux's target and formats to create an object mapping to traverse, inspect and interact with live tmux sessions.

view the documentation homepage, API information and architectural details.


$ [sudo] pip install libtmux

open a tmux session

session name foo, window name bar

$ tmux new-session -s foo -n bar

pilot your tmux session via python

$ python

# or for nice autocomplete and syntax highlighting
$ pip install ptpython
$ ptpython

connect to a live tmux session:

>>> import libtmux
>>> server = libtmux.Server()
>>> server
<libtmux.server.Server object at 0x7fbd622c1dd0>

list sessions:

>>> server.list_sessions()
[Session($3 foo), Session($1 libtmux)]

find session:

>>> server.get_by_id('$3')
Session($3 foo)

find session by dict lookup:

>>> server.find_where({ "session_name": "foo" })
Session($3 foo)

assign session to session:

>>> session = server.find_where({ "session_name": "foo" })

play with session:

>>> session.new_window(attach=False, window_name="ha in the bg")
Window(@8 2:ha in the bg, Session($3 foo))
>>> session.kill_window("ha in")

create new window in the background (don't switch to it):

>>> w = session.new_window(attach=False, window_name="ha in the bg")
Window(@11 3:ha in the bg, Session($3 foo))

kill window object directly:

>>> w.kill_window()

grab remaining tmux window:

>>> window = session.attached_window
>>> window.split_window(attach=False)
Pane(%23 Window(@10 1:bar, Session($3 foo)))

rename window:

>>> window.rename_window('libtmuxower')
Window(@10 1:libtmuxower, Session($3 foo))

create panes by splitting window:

>>> pane = window.split_window()
>>> pane = window.split_window(attach=False)
>>> pane.select_pane()
>>> window = session.new_window(attach=False, window_name="test")
>>> pane = window.split_window(attach=False)

send key strokes to panes:

>>> pane.send_keys('echo hey send now')

>>> pane.send_keys('echo hey', enter=False)
>>> pane.enter()

grab the output of pane:

>>> pane.clear()  # clear the pane
>>> pane.send_keys('cowsay hello')
>>> print('\n'.join(pane.cmd('capture-pane', '-p').stdout))
sh-3.2$ cowsay 'hello'
< hello >
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

powerful traversal features:

>>> pane.window
Window(@10 1:libtmuxower, Session($3 foo))
>>> pane.window.session
Session($3 foo)


Your donations fund development of new features, testing and support. Your money will go directly to maintenance and development of the project. If you are an individual, feel free to give whatever feels right for the value you get out of the project.

See donation options at

Project details

tmux support 1.8, 1.9a, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6
python support 2.7, >= 3.3, pypy, pypy3
Test Coverage
Open Hub
License MIT.
git repo
$ git clone
install stable
$ pip install libtmux
install dev
$ git clone libtmux
$ cd ./libtmux
$ virtualenv .venv
$ source .venv/bin/activate
$ pip install -e .

See the developing and testing page in the docs for more.

$ make test
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