def from_transport(cls, t, window_size=None, max_packet_size=None):
        """
        Create an SFTP client channel from an open `.Transport`.

        Setting the window and packet sizes might affect the transfer speed.
        The default settings in the `.Transport` class are the same as in
        OpenSSH and should work adequately for both files transfers and
        interactive sessions.

        :param .Transport t: an open `.Transport` which is already
            authenticated
        :param int window_size:
            optional window size for the `.SFTPClient` session.
        :param int max_packet_size:
            optional max packet size for the `.SFTPClient` session..

        :return:
            a new `.SFTPClient` object, referring to an sftp session (channel)
            across the transport

        .. versionchanged:: 1.15
            Added the ``window_size`` and ``max_packet_size`` arguments.
        """
        chan = t.open_session(
            window_size=window_size, max_packet_size=max_packet_size
        )
        if chan is None:
            return None
        chan.invoke_subsystem("sftp")
        return cls(chan)
def from_transport ( cls , t , window_size = None , max_packet_size = None ) : chan = t . open_session ( window_size = window_size , max_packet_size = max_packet_size ) if chan is None : return None chan . invoke_subsystem ( "sftp" ) return cls ( chan )
Create an SFTP client channel from an open `.Transport`.

        Setting the window and packet sizes might affect the transfer speed.
        The default settings in the `.Transport` class are the same as in
        OpenSSH and should work adequately for both files transfers and
        interactive sessions.

        :param .Transport t: an open `.Transport` which is already
            authenticated
        :param int window_size:
            optional window size for the `.SFTPClient` session.
        :param int max_packet_size:
            optional max packet size for the `.SFTPClient` session..

        :return:
            a new `.SFTPClient` object, referring to an sftp session (channel)
            across the transport

        .. versionchanged:: 1.15
            Added the ``window_size`` and ``max_packet_size`` arguments.