How to use the pydevd.PyDB function in pydevd

def __init__(self):
        self.commands = []
        self.command_meanings = []

    def add_command(self, cmd):
        from _pydevd_bundle.pydevd_comm import ID_TO_MEANING
        meaning = ID_TO_MEANING[str(cmd.id)]
        if DEBUG:
            print(meaning)
        self.command_meanings.append(meaning)
        if DEBUG:
            print(cmd._as_bytes.decode('utf-8'))
        self.commands.append(cmd)


class DummyPyDb(PyDB):

    def __init__(self):
        PyDB.__init__(self, set_as_global=False)

    def do_wait_suspend(
            self, thread, frame, event, arg, *args, **kwargs):
        from _pydevd_bundle.pydevd_constants import STATE_RUN
        info = thread.additional_info
        info.pydev_original_step_cmd = -1
        info.pydev_step_cmd = -1
        info.pydev_step_stop = None
        info.pydev_state = STATE_RUN

        return PyDB.do_wait_suspend(self, thread, frame, event, arg, *args, **kwargs)

# Try to import the packages needed to attach the debugger
                import pydevd
                from _pydev_imps._pydev_saved_modules import threading

            except:
                # This happens on Jython embedded in host eclipse
                traceback.print_exc()
                sys.stderr.write('pydevd is not available, cannot connect\n', )

            from _pydev_bundle import pydev_localhost
            threading.currentThread().__pydevd_id__ = "console_main"

            self.orig_find_frame = pydevd_vars.find_frame
            pydevd_vars.find_frame = self._findFrame

            self.debugger = pydevd.PyDB()
            try:
                pydevd.apply_debugger_options(debugger_options)
                self.debugger.connect(pydev_localhost.get_localhost(), debuggerPort)
                self.debugger.prepare_to_run()
                import pydevd_tracing
                pydevd_tracing.SetTrace(None)
            except:
                traceback.print_exc()
                sys.stderr.write('Failed to connect to target debugger.\n')

            # Register to process commands when idle
            self.debugrunning = False
            try:
                import pydevconsole
                pydevconsole.set_debug_hook(self.debugger.process_internal_commands)
            except:

# Try to import the packages needed to attach the debugger
                import pydevd
                import _pydev_threading as threading

            except:
                # This happens on Jython embedded in host eclipse
                traceback.print_exc()
                sys.stderr.write('pydevd is not available, cannot connect\n',)

            import pydev_localhost
            threading.currentThread().__pydevd_id__ = "console_main"

            self.orig_findFrame = pydevd_vars.findFrame
            pydevd_vars.findFrame = self._findFrame

            self.debugger = pydevd.PyDB()
            try:
                self.debugger.connect(pydev_localhost.get_localhost(), debuggerPort)
                self.debugger.prepareToRun()
                import pydevd_tracing
                pydevd_tracing.SetTrace(None)
            except:
                traceback.print_exc()
                sys.stderr.write('Failed to connect to target debugger.\n')

            # Register to process commands when idle
            self.debugrunning = False
            try:
                import pydevconsole
                pydevconsole.set_debug_hook(self.debugger.processInternalCommands)
            except:
                traceback.print_exc()

# This happens on Jython embedded in host eclipse
                traceback.print_exc()
                sys.stderr.write('pydevd is not available, cannot connect\n')

            from _pydevd_bundle.pydevd_constants import set_thread_id
            from _pydev_bundle import pydev_localhost
            set_thread_id(threading.currentThread(), "console_main")

            VIRTUAL_FRAME_ID = "1"  # matches PyStackFrameConsole.java
            VIRTUAL_CONSOLE_ID = "console_main"  # matches PyThreadConsole.java
            f = FakeFrame()
            f.f_back = None
            f.f_globals = {}  # As globals=locals here, let's simply let it empty (and save a bit of network traffic).
            f.f_locals = self.get_namespace()

            self.debugger = pydevd.PyDB()
            self.debugger.add_fake_frame(thread_id=VIRTUAL_CONSOLE_ID, frame_id=VIRTUAL_FRAME_ID, frame=f)
            try:
                pydevd.apply_debugger_options(debugger_options)
                self.debugger.connect(pydev_localhost.get_localhost(), debuggerPort)
                self.debugger.prepare_to_run()
                self.debugger.disable_tracing()
            except:
                traceback.print_exc()
                sys.stderr.write('Failed to connect to target debugger.\n')

            # Register to process commands when idle
            self.debugrunning = False
            try:
                import pydevconsole
                pydevconsole.set_debug_hook(self.debugger.process_internal_commands)
            except:

# Try to import the packages needed to attach the debugger
                import pydevd
                from _pydev_imps._pydev_saved_modules import threading

            except:
                # This happens on Jython embedded in host eclipse
                traceback.print_exc()
                sys.stderr.write('pydevd is not available, cannot connect\n', )

            from _pydev_bundle import pydev_localhost
            threading.currentThread().__pydevd_id__ = "console_main"

            self.orig_find_frame = pydevd_vars.find_frame
            pydevd_vars.find_frame = self._findFrame

            self.debugger = pydevd.PyDB()
            try:
                pydevd.apply_debugger_options(debugger_options)
                self.debugger.connect(pydev_localhost.get_localhost(), debuggerPort)
                self.debugger.prepare_to_run()
                from _pydevd_bundle import pydevd_tracing
                pydevd_tracing.SetTrace(None)
            except:
                traceback.print_exc()
                sys.stderr.write('Failed to connect to target debugger.\n')

            # Register to process commands when idle
            self.debugrunning = False
            try:
                import pydevconsole
                pydevconsole.set_debug_hook(self.debugger.process_internal_commands)
            except:

def run(address, filename, is_module, *args, **kwargs):
    # TODO: docstring
    # TODO: client/server -> address
    daemon = Daemon()
    if not daemon.wait_for_launch(address):
        return

    debugger = pydevd.PyDB()
    # We do not want some internal methods to get executed in non-debug mode.
    debugger.init_matplotlib_support = lambda *arg: None
    debugger.run(
        file=filename,
        globals=None,
        locals=None,
        is_module=is_module,
        set_trace=False)

def _setup_nodebug():
    ptvsd.log.debug('Running pydevd in nodebug mode.')
    debugger = pydevd.PyDB()
    debugger.init_matplotlib_support = lambda *arg: None
    # We are invoking run() solely for side effects here - setting up the
    # debugger and connecting to our socket - so the code run is a no-op.
    debugger.run(
        file='ptvsd._remote:_nop',
        globals=None,
        locals=None,
        is_module=True,
        set_trace=False)

if not _debugger_setup:
        pydevd_vm_type.setup_type()

        if SetupHolder.setup is None:
            setup = {
                'client': host,  # dispatch expects client to be set to the host address when server is False
                'server': False,
                'port': int(port),
                'multiprocess': patch_multiprocessing,
            }
            SetupHolder.setup = setup

        debugger = get_global_debugger()
        if debugger is None:
            debugger = PyDB()
        if block_until_connected:
            debugger.connect(host, port)  # Note: connect can raise error.
        else:
            # Create a dummy writer and wait for the real connection.
            debugger.writer = WriterThread(NULL, terminate_on_socket_close=False)
            debugger.create_wait_for_connection_thread()

        # Mark connected only if it actually succeeded.
        _debugger_setup = True
        bufferStdOutToServer = stdoutToServer
        bufferStdErrToServer = stderrToServer

        if bufferStdOutToServer:
            init_stdout_redirect()

        if bufferStdErrToServer: