Python logging.root() Examples

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def log_to_console(level=logging.WARNING, override_root_logger=False, **kwargs):
    """
    Configure the logging system to send log entries to the console.

    Note that the root logger will not log to Seq by default.

    :param level: The minimum level at which to log.
    :param override_root_logger: Override the root logger, too?
                                 Note - this might cause problems if third-party components try to be clever
                                 when using the logging.XXX functions.
    """

    logging.setLoggerClass(StructuredLogger)

    if override_root_logger:
        _override_root_logger()

    logging.basicConfig(
        style='{',
        handlers=[
            ConsoleStructuredLogHandler()
        ],
        level=level,
        **kwargs
    ) 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def build_logger_tree():
    """
    Build a DFS tree representing the logger layout.

    Adapted with much appreciation from: https://github.com/brandon-rhodes/logging_tree

    """
    cache = {}
    tree = make_logger_node("", root)
    for name, logger in sorted(root.manager.loggerDict.items()):
        if "." in name:
            parent_name = ".".join(name.split(".")[:-1])
            parent = cache[parent_name]
        else:
            parent = tree

        cache[name] = make_logger_node(name, logger, parent)
    return tree 

def getRoot(self):
        depth = 0
        if not self.root:
            p = self
            while p.getParent() != None and depth < self._maxResourceDepth:
                if p is p.getParent():
                    self.logger.error("Loop in resource parent link. "
                                      "Parent link points back to this resource.")
                    return None
                p = p.getParent()
                depth += 1
            if isinstance(p, RootResource):
                return p
            elif depth >= self._maxResourceDepth:
                self.logger.error("Possible loop in resource parent links, aborting search")
                return None
            else:
                return None
        return self.root 

def serve(services: List[Service],
          credentials: BrokerCredentials,
          logger: logging.Logger = logging.root,
          port=5000,
          debug=False):
    """
    Starts flask with the given broker

    :param services: Services that this broker provides
    :param credentials: Username and password that will be required to communicate with service broker
    :param logger: Used for api logs. This will not influence Flasks logging behavior
    :param port: Port
    :param debug: Enables debugging in flask app
    """

    from flask import Flask
    app = Flask(__name__)

    blueprint = get_blueprint(services, credentials, logger)

    logger.debug("Register openbrokerapi blueprint")
    app.register_blueprint(blueprint)

    logger.info("Start Flask on 0.0.0.0:%s" % port)
    app.run('0.0.0.0', port, debug) 

def _handle_existing_loggers(existing, child_loggers, disable_existing):
    """
    When (re)configuring logging, handle loggers which were in the previous
    configuration but are not in the new configuration. There's no point
    deleting them as other threads may continue to hold references to them;
    and by disabling them, you stop them doing any logging.

    However, don't disable children of named loggers, as that's probably not
    what was intended by the user. Also, allow existing loggers to NOT be
    disabled if disable_existing is false.
    """
    root = logging.root
    for log in existing:
        logger = root.manager.loggerDict[log]
        if log in child_loggers:
            logger.level = logging.NOTSET
            logger.handlers = []
            logger.propagate = True
        elif disable_existing:
            logger.disabled = True 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def get_logger(name=None, level=None, stream=DEFAULT_STREAM,
               clobber_root_handler=True, logger_factory=None,
               wrapper_class=None):
    """Configure and return a logger with structlog and stdlib."""
    _configure_logger(
        logger_factory=logger_factory,
        wrapper_class=wrapper_class)
    log = structlog.get_logger(name)
    root_logger = logging.root
    if log == root_logger:
        if not _has_streamhandler(root_logger, level=level, stream=stream):
            stream_handler = logging.StreamHandler(stream)
            stream_handler.setLevel(level)
            stream_handler.setFormatter(logging.Formatter(fmt=LOG_FORMAT))
            root_logger.addHandler(stream_handler)
        else:
            if clobber_root_handler:
                for handler in root_logger.handlers:
                    handler.setFormatter(logging.Formatter(fmt=LOG_FORMAT))
    if level:
        log.setLevel(level)
    return log 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def _test_log(self, method, level=None):
        called = []
        patch(self, logging, 'basicConfig',
              lambda *a, **kw: called.append((a, kw)))

        recording = RecordingHandler()
        logging.root.addHandler(recording)

        log_method = getattr(logging, method)
        if level is not None:
            log_method(level, "test me: %r", recording)
        else:
            log_method("test me: %r", recording)

        self.assertEqual(len(recording.records), 1)
        record = recording.records[0]
        self.assertEqual(record.getMessage(), "test me: %r" % recording)

        expected_level = level if level is not None else getattr(logging, method.upper())
        self.assertEqual(record.levelno, expected_level)

        # basicConfig was not called!
        self.assertEqual(called, []) 

def test_no_kwargs(self):
        logging.basicConfig()

        # handler defaults to a StreamHandler to sys.stderr
        self.assertEqual(len(logging.root.handlers), 1)
        handler = logging.root.handlers[0]
        self.assertIsInstance(handler, logging.StreamHandler)
        self.assertEqual(handler.stream, sys.stderr)

        formatter = handler.formatter
        # format defaults to logging.BASIC_FORMAT
        self.assertEqual(formatter._style._fmt, logging.BASIC_FORMAT)
        # datefmt defaults to None
        self.assertIsNone(formatter.datefmt)
        # style defaults to %
        self.assertIsInstance(formatter._style, logging.PercentStyle)

        # level is not explicitly set
        self.assertEqual(logging.root.level, self.original_logging_level) 

def test_handlers(self):
        handlers = [
            logging.StreamHandler(),
            logging.StreamHandler(sys.stdout),
            logging.StreamHandler(),
        ]
        f = logging.Formatter()
        handlers[2].setFormatter(f)
        logging.basicConfig(handlers=handlers)
        self.assertIs(handlers[0], logging.root.handlers[0])
        self.assertIs(handlers[1], logging.root.handlers[1])
        self.assertIs(handlers[2], logging.root.handlers[2])
        self.assertIsNotNone(handlers[0].formatter)
        self.assertIsNotNone(handlers[1].formatter)
        self.assertIs(handlers[2].formatter, f)
        self.assertIs(handlers[0].formatter, handlers[1].formatter) 

def _test_log(self, method, level=None):
        # logging.root has no handlers so basicConfig should be called
        called = []

        old_basic_config = logging.basicConfig
        def my_basic_config(*a, **kw):
            old_basic_config()
            old_level = logging.root.level
            logging.root.setLevel(100)  # avoid having messages in stderr
            self.addCleanup(logging.root.setLevel, old_level)
            called.append((a, kw))

        patch(self, logging, 'basicConfig', my_basic_config)

        log_method = getattr(logging, method)
        if level is not None:
            log_method(level, "test me")
        else:
            log_method("test me")

        # basicConfig was called with no arguments
        self.assertEqual(called, [((), {})]) 

def setUp(self):
        super(LoggerAdapterTest, self).setUp()
        old_handler_list = logging._handlerList[:]

        self.recording = RecordingHandler()
        self.logger = logging.root
        self.logger.addHandler(self.recording)
        self.addCleanup(self.logger.removeHandler, self.recording)
        self.addCleanup(self.recording.close)

        def cleanup():
            logging._handlerList[:] = old_handler_list

        self.addCleanup(cleanup)
        self.addCleanup(logging.shutdown)
        self.adapter = logging.LoggerAdapter(logger=self.logger, extra=None) 

def _handle_existing_loggers(existing, child_loggers, disable_existing):
    """
    When (re)configuring logging, handle loggers which were in the previous
    configuration but are not in the new configuration. There's no point
    deleting them as other threads may continue to hold references to them;
    and by disabling them, you stop them doing any logging.

    However, don't disable children of named loggers, as that's probably not
    what was intended by the user. Also, allow existing loggers to NOT be
    disabled if disable_existing is false.
    """
    root = logging.root
    for log in existing:
        logger = root.manager.loggerDict[log]
        if log in child_loggers:
            logger.level = logging.NOTSET
            logger.handlers = []
            logger.propagate = True
        else:
            logger.disabled = disable_existing 

def create_file(self, update_data=True):

        # TODO: save changes in current file

        file_name = get_save_file_name(_('Create SportOrg file'), _("SportOrg file (*.sportorg)"),
                                       str(time.strftime("%Y%m%d")))
        if file_name is not '':
            try:
                GlobalAccess().clear_filters(remove_condition=False)
                File(file_name, logging.root).create()
                self.file = file_name
                self.add_recent_file(self.file)
                self.set_title(file_name)
            except Exception as e:
                logging.exception(str(e))
                QMessageBox.warning(self, _('Error'), _('Cannot create file') + ': ' + file_name)
            # remove data
            if update_data:
                races[0] = Race()
            self.refresh() 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def _test_log(self, method, level=None):
        called = []
        patch(self, logging, 'basicConfig',
              lambda *a, **kw: called.append((a, kw)))

        recording = RecordingHandler()
        logging.root.addHandler(recording)

        log_method = getattr(logging, method)
        if level is not None:
            log_method(level, "test me: %r", recording)
        else:
            log_method("test me: %r", recording)

        self.assertEqual(len(recording.records), 1)
        record = recording.records[0]
        self.assertEqual(record.getMessage(), "test me: %r" % recording)

        expected_level = level if level is not None else getattr(logging, method.upper())
        self.assertEqual(record.levelno, expected_level)

        # basicConfig was not called!
        self.assertEqual(called, []) 

def test_no_kwargs(self):
        logging.basicConfig()

        # handler defaults to a StreamHandler to sys.stderr
        self.assertEqual(len(logging.root.handlers), 1)
        handler = logging.root.handlers[0]
        self.assertIsInstance(handler, logging.StreamHandler)
        self.assertEqual(handler.stream, sys.stderr)

        formatter = handler.formatter
        # format defaults to logging.BASIC_FORMAT
        self.assertEqual(formatter._style._fmt, logging.BASIC_FORMAT)
        # datefmt defaults to None
        self.assertIsNone(formatter.datefmt)
        # style defaults to %
        self.assertIsInstance(formatter._style, logging.PercentStyle)

        # level is not explicitly set
        self.assertEqual(logging.root.level, self.original_logging_level) 

def test_filename(self):

        def cleanup(h1, h2, fn):
            h1.close()
            h2.close()
            os.remove(fn)

        logging.basicConfig(filename='test.log')

        self.assertEqual(len(logging.root.handlers), 1)
        handler = logging.root.handlers[0]
        self.assertIsInstance(handler, logging.FileHandler)

        expected = logging.FileHandler('test.log', 'a')
        self.assertEqual(handler.stream.mode, expected.stream.mode)
        self.assertEqual(handler.stream.name, expected.stream.name)
        self.addCleanup(cleanup, handler, expected, 'test.log') 

def test_handlers(self):
        handlers = [
            logging.StreamHandler(),
            logging.StreamHandler(sys.stdout),
            logging.StreamHandler(),
        ]
        f = logging.Formatter()
        handlers[2].setFormatter(f)
        logging.basicConfig(handlers=handlers)
        self.assertIs(handlers[0], logging.root.handlers[0])
        self.assertIs(handlers[1], logging.root.handlers[1])
        self.assertIs(handlers[2], logging.root.handlers[2])
        self.assertIsNotNone(handlers[0].formatter)
        self.assertIsNotNone(handlers[1].formatter)
        self.assertIs(handlers[2].formatter, f)
        self.assertIs(handlers[0].formatter, handlers[1].formatter) 

def _test_log(self, method, level=None):
        # logging.root has no handlers so basicConfig should be called
        called = []

        old_basic_config = logging.basicConfig
        def my_basic_config(*a, **kw):
            old_basic_config()
            old_level = logging.root.level
            logging.root.setLevel(100)  # avoid having messages in stderr
            self.addCleanup(logging.root.setLevel, old_level)
            called.append((a, kw))

        patch(self, logging, 'basicConfig', my_basic_config)

        log_method = getattr(logging, method)
        if level is not None:
            log_method(level, "test me")
        else:
            log_method("test me")

        # basicConfig was called with no arguments
        self.assertEqual(called, [((), {})]) 

def setUp(self):
        super(LoggerAdapterTest, self).setUp()
        old_handler_list = logging._handlerList[:]

        self.recording = RecordingHandler()
        self.logger = logging.root
        self.logger.addHandler(self.recording)
        self.addCleanup(self.logger.removeHandler, self.recording)
        self.addCleanup(self.recording.close)

        def cleanup():
            logging._handlerList[:] = old_handler_list

        self.addCleanup(cleanup)
        self.addCleanup(logging.shutdown)
        self.adapter = logging.LoggerAdapter(logger=self.logger, extra=None) 

def _handle_existing_loggers(existing, child_loggers, disable_existing):
    """
    When (re)configuring logging, handle loggers which were in the previous
    configuration but are not in the new configuration. There's no point
    deleting them as other threads may continue to hold references to them;
    and by disabling them, you stop them doing any logging.

    However, don't disable children of named loggers, as that's probably not
    what was intended by the user. Also, allow existing loggers to NOT be
    disabled if disable_existing is false.
    """
    root = logging.root
    for log in existing:
        logger = root.manager.loggerDict[log]
        if log in child_loggers:
            logger.level = logging.NOTSET
            logger.handlers = []
            logger.propagate = True
        else:
            logger.disabled = disable_existing 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._levelNames[level])
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def set_log_levels():
    """
    Read the logging config file and set up log levels for the different
    loggers.
    """
    config = get_logging_conf()
    if 'levels' not in config.sections():
        return

    for logger_name in config.options('levels'):
        level = config.get('levels', logger_name)
        # Allow the config file to specify the root logger as 'root'
        if logger_name.lower() == 'root':
            logger_name = ''
        logger = logging.getLogger(logger_name)
        logger.setLevel(translate_log_level(level)) 

def set_custom_log_file():
    """Read logging config and add additional file handlers to specified logs"""

    logdir = os.path.join(nav.buildconf.localstatedir, 'log')
    config = get_logging_conf()
    section = 'files'

    if section not in config.sections():
        return

    for logger_name in config.options(section):
        filename = config.get(section, logger_name)
        # Allow the config file to specify the root logger as 'root'
        if logger_name.lower() == 'root':
            logger_name = ''
        logger = logging.getLogger(logger_name)

        filehandler = logging.FileHandler(os.path.join(logdir, filename))
        filehandler.setFormatter(DEFAULT_LOG_FORMATTER)
        logger.addHandler(filehandler) 

def reopen_log_files():
    """
    Function to iterate over all FileHandlers in the logger hierarchy, close
    their streams and reopen them.
    """
    # Get the manager of the root logger
    root = logging.getLogger()
    manager = root.manager
    mylog = logging.getLogger('nav.logs')
    for logger in [root] + manager.loggerDict.values():
        try:
            for hdl in logger.handlers:
                if isinstance(hdl, logging.FileHandler):
                    mylog.debug("Reopening " + hdl.baseFilename)
                    hdl.flush()
                    hdl.acquire()
                    hdl.stream.close()
                    hdl.stream = open(hdl.baseFilename, hdl.mode)
                    hdl.release()
                    mylog.debug("Reopened " + hdl.baseFilename)
        except AttributeError:
            continue 

def get_logfile_from_logger(logger=logging.root):
    """Return the file object of the first FileHandler of a given logger.

    This can be used as shorthand for redirecting the low-level stderr
    file descriptor to a log file after daemonization.

    Example usage:
        nav.daemon.daemonize('/var/run/nav/mydaemon.pid',
                             stderr=get_logfile_from_logger())

    Arguments:
        ``logger'' the logger object whose first FileHandler's file will be
                   returned.  If omitted, the root logger is searched for a
                   FileHandler.

    Returns:
        A file object, or None if no FileHandlers were found.

    """
    for handler in logger.handlers:
        if isinstance(handler, logging.FileHandler):
            return handler.stream 

def setup_logging(tag):
    """Sets up the logging module.
    """
    # Create formatter, with same format as C extension
    fmt = "[%s] %%(asctime)s %%(levelname)s: %%(message)s" % tag
    formatter = LoggingDateFormatter(fmt)

    # Console logger
    handler = logging.StreamHandler()
    handler.setLevel(logging.INFO)
    handler.setFormatter(formatter)

    # Set up logger
    logger = logging.root
    logger.setLevel(logging.INFO)
    logger.addHandler(handler) 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def _test_log(self, method, level=None):
        called = []
        patch(self, logging, 'basicConfig',
              lambda *a, **kw: called.append((a, kw)))

        recording = RecordingHandler()
        logging.root.addHandler(recording)

        log_method = getattr(logging, method)
        if level is not None:
            log_method(level, "test me: %r", recording)
        else:
            log_method("test me: %r", recording)

        self.assertEqual(len(recording.records), 1)
        record = recording.records[0]
        self.assertEqual(record.getMessage(), "test me: %r" % recording)

        expected_level = level if level is not None else getattr(logging, method.upper())
        self.assertEqual(record.levelno, expected_level)

        # basicConfig was not called!
        self.assertEqual(called, []) 

def test_no_kwargs(self):
        logging.basicConfig()

        # handler defaults to a StreamHandler to sys.stderr
        self.assertEqual(len(logging.root.handlers), 1)
        handler = logging.root.handlers[0]
        self.assertIsInstance(handler, logging.StreamHandler)
        self.assertEqual(handler.stream, sys.stderr)

        formatter = handler.formatter
        # format defaults to logging.BASIC_FORMAT
        self.assertEqual(formatter._style._fmt, logging.BASIC_FORMAT)
        # datefmt defaults to None
        self.assertIsNone(formatter.datefmt)
        # style defaults to %
        self.assertIsInstance(formatter._style, logging.PercentStyle)

        # level is not explicitly set
        self.assertEqual(logging.root.level, self.original_logging_level) 

def test_filename(self):

        def cleanup(h1, h2, fn):
            h1.close()
            h2.close()
            os.remove(fn)

        logging.basicConfig(filename='test.log')

        self.assertEqual(len(logging.root.handlers), 1)
        handler = logging.root.handlers[0]
        self.assertIsInstance(handler, logging.FileHandler)

        expected = logging.FileHandler('test.log', 'a')
        self.assertEqual(handler.stream.mode, expected.stream.mode)
        self.assertEqual(handler.stream.name, expected.stream.name)
        self.addCleanup(cleanup, handler, expected, 'test.log') 

def test_handlers(self):
        handlers = [
            logging.StreamHandler(),
            logging.StreamHandler(sys.stdout),
            logging.StreamHandler(),
        ]
        f = logging.Formatter()
        handlers[2].setFormatter(f)
        logging.basicConfig(handlers=handlers)
        self.assertIs(handlers[0], logging.root.handlers[0])
        self.assertIs(handlers[1], logging.root.handlers[1])
        self.assertIs(handlers[2], logging.root.handlers[2])
        self.assertIsNotNone(handlers[0].formatter)
        self.assertIsNotNone(handlers[1].formatter)
        self.assertIs(handlers[2].formatter, f)
        self.assertIs(handlers[0].formatter, handlers[1].formatter) 

def _test_log(self, method, level=None):
        # logging.root has no handlers so basicConfig should be called
        called = []

        old_basic_config = logging.basicConfig
        def my_basic_config(*a, **kw):
            old_basic_config()
            old_level = logging.root.level
            logging.root.setLevel(100)  # avoid having messages in stderr
            self.addCleanup(logging.root.setLevel, old_level)
            called.append((a, kw))

        patch(self, logging, 'basicConfig', my_basic_config)

        log_method = getattr(logging, method)
        if level is not None:
            log_method(level, "test me")
        else:
            log_method("test me")

        # basicConfig was called with no arguments
        self.assertEqual(called, [((), {})]) 

def setUp(self):
        super(LoggerAdapterTest, self).setUp()
        old_handler_list = logging._handlerList[:]

        self.recording = RecordingHandler()
        self.logger = logging.root
        self.logger.addHandler(self.recording)
        self.addCleanup(self.logger.removeHandler, self.recording)
        self.addCleanup(self.recording.close)

        def cleanup():
            logging._handlerList[:] = old_handler_list

        self.addCleanup(cleanup)
        self.addCleanup(logging.shutdown)
        self.adapter = logging.LoggerAdapter(logger=self.logger, extra=None) 

def _handle_existing_loggers(existing, child_loggers, disable_existing):
    """
    When (re)configuring logging, handle loggers which were in the previous
    configuration but are not in the new configuration. There's no point
    deleting them as other threads may continue to hold references to them;
    and by disabling them, you stop them doing any logging.

    However, don't disable children of named loggers, as that's probably not
    what was intended by the user. Also, allow existing loggers to NOT be
    disabled if disable_existing is false.
    """
    root = logging.root
    for log in existing:
        logger = root.manager.loggerDict[log]
        if log in child_loggers:
            logger.level = logging.NOTSET
            logger.handlers = []
            logger.propagate = True
        else:
            logger.disabled = disable_existing 

def common_logger_config(self, logger, config, incremental=False):
        """
        Perform configuration which is common to root and non-root loggers.
        """
        level = config.get('level', None)
        if level is not None:
            logger.setLevel(logging._checkLevel(level))
        if not incremental:
            #Remove any existing handlers
            for h in logger.handlers[:]:
                logger.removeHandler(h)
            handlers = config.get('handlers', None)
            if handlers:
                self.add_handlers(logger, handlers)
            filters = config.get('filters', None)
            if filters:
                self.add_filters(logger, filters) 

def reconfigure_rootlogger(cls,
            use_stderr=False, use_file='', verbose=False):

        cls._configured = True
        level = logging.DEBUG if verbose else logging.INFO

        # Clear out current handlers to allow re-use of basicConfig.
        rootlogger = logging.root       # old school: logging.getLogger('')
        cls._remove_handlers(rootlogger)

        if use_stderr:                  # does logging.RootLogger.addHandler()
            logging.basicConfig(        # only the first call matters
                stream=sys.stderr,
                format=cls._format,
                datefmt=cls._datefmt,
                level=level)

        if use_file:
            h = cls._setup_filehandler(use_file, backupCount=3)
            rootlogger.addHandler(h)
            rootlogger.setLevel(level) 

def configure_logger(self, name, config, incremental=False):
        """Configure a non-root logger from a dictionary."""
        logger = logging.getLogger(name)
        self.common_logger_config(logger, config, incremental)
        propagate = config.get('propagate', None)
        if propagate is not None:
            logger.propagate = propagate 

def configure_root(self, config, incremental=False):
        """Configure a root logger from a dictionary."""
        root = logging.getLogger()
        self.common_logger_config(root, config, incremental) 

def _resetExistingLoggers(parent="root"):
	""" Reset the logger named 'parent' and all its children to their initial
	state, if they already exist in the current configuration.
	"""
	root = logging.root
	# get sorted list of all existing loggers
	existing = sorted(root.manager.loggerDict.keys())
	if parent == "root":
		# all the existing loggers are children of 'root'
		loggers_to_reset = [parent] + existing
	elif parent not in existing:
		# nothing to do
		return
	elif parent in existing:
		loggers_to_reset = [parent]
		# collect children, starting with the entry after parent name
		i = existing.index(parent) + 1
		prefixed = parent + "."
		pflen = len(prefixed)
		num_existing = len(existing)
		while i < num_existing:
			if existing[i][:pflen] == prefixed:
				loggers_to_reset.append(existing[i])
			i += 1
	for name in loggers_to_reset:
		if name == "root":
			root.setLevel(logging.WARNING)
			for h in root.handlers[:]:
				root.removeHandler(h)
			for f in root.filters[:]:
				root.removeFilters(f)
			root.disabled = False
		else:
			logger = root.manager.loggerDict[name]
			logger.level = logging.NOTSET
			logger.handlers = []
			logger.filters = []
			logger.propagate = True
			logger.disabled = False 

def _override_root_logger():
    """
    Override the root logger with a `StructuredRootLogger`.
    """

    logging.root = StructuredRootLogger(logging.WARNING)
    logging.Logger.root = logging.root
    logging.Logger.manager = logging.Manager(logging.Logger.root)