Pane.from_env

>>> socket_path = server.cmd(  # doctest: +HIDE
...     "display-message", "-p", "-t", pane.pane_id, "#{socket_path}"
... ).stdout[0]
>>> env = {  # doctest: +HIDE
...     "TMUX": f"{socket_path},1,0",
...     "TMUX_PANE": pane.pane_id,
... }

>>> Pane.from_env(env)
Pane(%1 Window(@1 1:..., Session($1 ...)))

>>> Pane.from_env(env).pane_id == pane.pane_id
True

>>> from libtmux import exc
>>> try:
...     Pane.from_env({})
... except exc.NotInsideTmux as e:
...     print(e)
Not inside a tmux pane: $TMUX is unset or empty