How to use the smbprotocol.session.Session function in smbprotocol

def session(self):
        server = os.environ.get('PYPSEXEC_SERVER', None)
        username = os.environ.get('PYPSEXEC_USERNAME', None)
        password = os.environ.get('PYPSEXEC_PASSWORD', None)

        if server and username and password:
            connection = Connection(uuid.uuid4(), server, 445)
            session = Session(connection, username, password)
            tree = TreeConnect(session, r"\\%s\ADMIN$" % server)
            paexec_file = Open(tree, "PAExec.exe")

            connection.connect()
            try:

                session.connect()
                tree.connect()

                paexec_file.create(ImpersonationLevel.Impersonation,
                                   FilePipePrinterAccessMask.FILE_WRITE_DATA,
                                   FileAttributes.FILE_ATTRIBUTE_NORMAL,
                                   ShareAccess.FILE_SHARE_READ,
                                   CreateDisposition.FILE_OVERWRITE_IF,
                                   CreateOptions.FILE_NON_DIRECTORY_FILE)
                paexec_file.write(pkgutil.get_data('pypsexec', 'paexec.exe'), 0)

def test_parse_pdu_fine(self):
        connection = Connection(uuid.uuid4(), "server", 445)
        session = Session(connection, "user", "password")
        api = SCMRApi(session)
        response_pdu = ResponsePDU()
        response_pdu['packed_drep'] = DataRepresentationFormat()
        response_pdu['stub_data'] = b"\x01\x02\x03\x04"
        expected = b"\x01\x02\x03\x04"
        actual = api._parse_pdu(response_pdu.pack(), 10)
        assert actual == expected

def test_parse_error_unknown(self):
        connection = Connection(uuid.uuid4(), "server", 445)
        session = Session(connection, "user", "password")
        api = SCMRApi(session)
        with pytest.raises(SCMRException) as exc:
            api._parse_error(999, "function_name")
        assert str(exc.value) == "Exception calling function_name. Code: 999" \
                                 ", Msg: ERROR_UNKNOWN"

def test_marshal_string_none(self):
        connection = Connection(uuid.uuid4(), "server", 445)
        session = Session(connection, "user", "password")
        api = SCMRApi(session)

        expected = b"\x00\x00\x00\x00"
        actual = api._marshal_string(None)
        assert actual == expected

def test_parse_error(self):
        connection = Connection(uuid.uuid4(), "server", 445)
        session = Session(connection, "user", "password")
        api = SCMRApi(session)
        with pytest.raises(SCMRException) as exc:
            api._parse_error(5, "function_name")
        assert str(exc.value) == "Exception calling function_name. Code: 5" \
                                 ", Msg: ERROR_ACCESS_DENIED"

def test_marshal_string_no_padding(self):
        connection = Connection(uuid.uuid4(), "server", 445)
        session = Session(connection, "user", "password")
        api = SCMRApi(session)

        expected = b"\x02\x00\x00\x00" \
                   b"\x00\x00\x00\x00" \
                   b"\x02\x00\x00\x00" \
                   b"\x68\x00\x00\x00"
        actual = api._marshal_string("h")
        assert actual == expected

def test_parse_pdu_failure(self):
        connection = Connection(uuid.uuid4(), "server", 445)
        session = Session(connection, "user", "password")
        api = SCMRApi(session)
        fault_pdu = FaultPDU()
        fault_pdu['packed_drep'] = DataRepresentationFormat()
        with pytest.raises(PDUException) as exc:
            api._parse_pdu(fault_pdu.pack(), 10)
        assert "Expecting ResponsePDU for opnum 10 response but got: " \
               "FaultPDU" in str(exc.value)

def test_marshal_string_as_referent(self):
        connection = Connection(uuid.uuid4(), "server", 445)
        session = Session(connection, "user", "password")
        api = SCMRApi(session)

        expected = b"\x00\x00\x00\x01" \
                   b"\x03\x00\x00\x00" \
                   b"\x00\x00\x00\x00" \
                   b"\x03\x00\x00\x00" \
                   b"\x68\x00\x69\x00\x00\x00" \
                   b"\x00\x00"
        actual = api._marshal_string("hi", unique=True)
        assert actual == expected

#arguments = "Write-Host hello world; Start-Sleep -Seconds 10; Write-Host another hello; Write-Error hell"
#arguments = "Write-Host hello world; Start-Sleep -Seconds 5; Write-Host another hello; Write-Error hell"

svc_name = "PAExec-%d-%s" % (pid, current_host)

exe_payload = paexec_out_stream
exe_path = "%s.exe" % svc_name

# Setup SMB connection and session
guid = uuid.uuid4()

connection = Connection(guid, server, port)
try:
    connection.connect()

    session = Session(connection, username, password)
    session.connect()

    # open the service manager
    scmr_api = SCMRApi(session)
    scmr_api.open()

    try:
        sc_desired_access = DesiredAccess.SC_MANAGER_CONNECT | \
                            DesiredAccess.SC_MANAGER_CREATE_SERVICE | \
                            DesiredAccess.SC_MANAGER_ENUMERATE_SERVICE
        scm_handle = scmr_api.open_sc_manager_w(server, None, sc_desired_access)

        try:
            svc_desired_access = DesiredAccess.SERVICE_QUERY_STATUS | \
                                 DesiredAccess.SERVICE_START | \
                                 DesiredAccess.SERVICE_STOP | \

def __init__(self, server, username=None, password=None, port=445,
                 encrypt=True):
        self.server = server
        self.port = port
        self.pid = os.getpid()
        self.current_host = socket.gethostname()
        self.connection = Connection(uuid.uuid4(), server, port)
        self.session = Session(self.connection, username, password,
                               require_encryption=encrypt)

        self.service_name = "PAExec-%d-%s" % (self.pid, self.current_host)
        log.info("Creating PyPsexec Client with unique name: %s"
                 % self.service_name)
        self._exe_file = "%s.exe" % self.service_name
        self._stdout_pipe_name = "PaExecOut%s%d"\
                                 % (self.current_host, self.pid)
        self._stderr_pipe_name = "PaExecErr%s%d"\
                                 % (self.current_host, self.pid)
        self._stdin_pipe_name = "PaExecIn%s%d" % (self.current_host, self.pid)
        self._unique_id = get_unique_id(self.pid, self.current_host)
        log.info("Generated unique ID for PyPsexec Client: %d"
                 % self._unique_id)
        self._service = Service(self.service_name, self.session)