How to use the libtmux.pane.Pane function in libtmux

# tmux < 1.7. This is added in 1.7.
        if pane.stderr:
            raise exc.LibTmuxException(pane.stderr)
            if 'pane too small' in pane.stderr:
                pass

            raise exc.LibTmuxException(pane.stderr, self._info, self.panes)
        else:
            pane = pane.stdout[0]

            pane = dict(zip(pformats, pane.split('\t')))

            # clear up empty dict
            pane = dict((k, v) for k, v in pane.items() if v)

        return Pane(window=self, **pane)

# tmux < 1.7. This is added in 1.7.
        if pane.stderr:
            raise exc.LibTmuxException(pane.stderr)
            if 'pane too small' in pane.stderr:
                pass

            raise exc.LibTmuxException(pane.stderr, self._TMUX, self.panes)
        else:
            pane = pane.stdout[0]

            pane = dict(zip(pformats, pane.split('\t')))

            # clear up empty dict
            pane = dict((k, v) for k, v in pane.items() if v)

        return Pane(window=self, **pane)

def list_panes(self):
        """Return list of :class:`Pane` for the window.

        :rtype: list of :class:`Pane`

        """

        return [Pane(window=self, **pane) for pane in self._panes]

def attached_pane(self):
        """Return the attached :class:`Pane`.

        :rtype: :class:`Pane`

        """
        for pane in self._panes:
            if 'pane_active' in pane:
                # for now pane_active is a unicode
                if pane.get('pane_active') == '1':
                    # return Pane(window=self, **pane)
                    return Pane(window=self, **pane)
                else:
                    continue

        return []

def list_panes(self):
        """
        Return list of :class:`Pane` for the window.

        Returns
        -------
        list of :class:`Pane`
        """

        return [Pane(window=self, **pane) for pane in self._panes]

else:

                def get_pane_start_directory():

                    if 'start_directory' in pconf:
                        return pconf['start_directory']
                    elif 'start_directory' in wconf:
                        return wconf['start_directory']
                    else:
                        return None

                p = w.split_window(
                    attach=True, start_directory=get_pane_start_directory(), target=p.id
                )

            assert isinstance(p, Pane)
            if 'layout' in wconf:
                w.select_layout(wconf['layout'])

            if 'suppress_history' in pconf:
                suppress = pconf['suppress_history']
            elif 'suppress_history' in wconf:
                suppress = wconf['suppress_history']
            else:
                suppress = True

            for cmd in pconf['shell_command']:
                p.send_keys(cmd, suppress_history=suppress)

            if 'focus' in pconf and pconf['focus']:
                w.select_pane(p['pane_id'])

def attached_pane(self):
        """
        Return the attached :class:`Pane`.

        Returns
        -------
        :class:`Pane`
        """
        for pane in self._panes:
            if 'pane_active' in pane:
                # for now pane_active is a unicode
                if pane.get('pane_active') == '1':
                    return Pane(window=self, **pane)
                else:
                    continue

        return []