How to use the pgctl.debug.debug function in pgctl

def __get_timeout(self, name, default):
        timeout = self.path.join(name, abs=1)
        if timeout.check():
            debug('%s exists', name)
            return float(timeout.read().strip())
        else:
            debug('%s doesn\'t exist', name)
            return float(default)

def flock(self):
        # if we already have the lock, from a parent process, use it.
        parent_service = os.environ.pop('PGCTL_SERVICE', None)
        lock = os.environ.pop('PGCTL_SERVICE_LOCK', None)
        debug('parentlock: %r', parent_service)
        if lock:
            lock = int(lock)
            if parent_service == self.path:
                debug('retrieved parent lock! %i', lock)
                try:
                    yield lock
                finally:
                    os.close(lock)
                return
            else:
                from .flock import release
                release(lock)

        with flock(self.path.strpath) as lock:
            debug('LOCK: %i', lock)
            self.ensure_directory_structure()
            with self.path.as_cwd():
                yield lock

debug('parentlock: %r', parent_service)
        if lock:
            lock = int(lock)
            if parent_service == self.path:
                debug('retrieved parent lock! %i', lock)
                try:
                    yield lock
                finally:
                    os.close(lock)
                return
            else:
                from .flock import release
                release(lock)

        with flock(self.path.strpath) as lock:
            debug('LOCK: %i', lock)
            self.ensure_directory_structure()
            with self.path.as_cwd():
                yield lock

def __get_timeout(self, name, default):
        timeout = self.path.join(name, abs=1)
        if timeout.check():
            debug('%s exists', name)
            return float(timeout.read().strip())
        else:
            debug('%s doesn\'t exist', name)
            return float(default)

def flock(self):
        # if we already have the lock, from a parent process, use it.
        parent_service = os.environ.pop('PGCTL_SERVICE', None)
        lock = os.environ.pop('PGCTL_SERVICE_LOCK', None)
        debug('parentlock: %r', parent_service)
        if lock:
            lock = int(lock)
            if parent_service == self.path:
                debug('retrieved parent lock! %i', lock)
                try:
                    yield lock
                finally:
                    os.close(lock)
                return
            else:
                from .flock import release
                release(lock)

        with flock(self.path.strpath) as lock:
            debug('LOCK: %i', lock)
            self.ensure_directory_structure()