实现了简单版本的logging.config，支持一般的通过config文件进行配置。感觉还有更好的方法，是直接利用logging.config.fileconfig(log_config_file)方式读进来之后，通过修改handler方式来进行修改。
代码如下:
“””project trace system”””import sysimport configparserimport loggingimport logging.configimport warnings
if __name__ == “__main__”: log_config_file = “log.conf” log_data_file = “logs/run.log”
level_dic = { “debug”: logging.debug, “info”: logging.info, “warning”: logging.warning, “error”: logging.error, “critical”: logging.critical }class logconfig(object): def __init__(self, log_config_file, log_data_file=none): self.log_config_file = log_config_file self.log_data_file = log_data_file # for self app self.log_config = configparser.rawconfigparser() self.log_config.read(self.log_config_file) self.logger_prefix = “logger_” self.handler_prefix = “handler_” self.formatter_prefix = “formatter_” self._check_section() self._parse_option() def _check_section(self): # check logger self.__check_logger() # check handler self.__check_handler() # check formatter self.__check_formatter() def _parse_option(self): # parse formatter option for formatter, formatter_info in self.formatters.items(): section_name = formatter_info[“section_name”] f = self.log_config.get(section_name, “format”) datefmt = self.log_config.get(section_name, “datefmt”) self.formatters[formatter][“value”] = logging.formatter(f, datefmt) # parse handlers for handler, handler_info in self.handlers.items(): section_name = handler_info[“section_name”] handler_class = self.log_config.get(section_name, “class”) handler_str = self.log_config.get(section_name, “args”) handler_args = eval(self.log_config.get(section_name, “args”)) level = self.log_config.get(section_name, “level”) formatter = self.log_config.get(section_name, “formatter”) _handler = eval(“logging.”+handler_class) # only filehandler has file path paramter. if isinstance(_handler, logging.filehandler): if self.log_data_file: handler_args[0] = self.log_data_file else: warnings.warn(“filehandler found, but log data file is not specified”) self.handlers[handler][“value”] = _handler(*handler_args) self.handlers[handler][“value”].setlevel( level_dic.get(level.upper(), level_dic[“info”])) self.handlers[handler][“value”].setformatter( self.formatters[formatter][“value”]) # parse logger for logger, logger_info in self.loggers.items(): section_name = logger_info[“section_name”] self.__parse_logger(logger, section_name) def __parse_logger(self, logger_name, section_name): “”” “”” tuple_items = self.log_config.items(section_name) logger = logging.getlogger(logger_name) for k, v in tuple_items: if k == “handlers”: handlers = filter(none, [h.strip() for h in v.split(“,”)]) for h in handlers: logger.addhandler(self.handlers[h][“value”]) if k == “level”: logger.setlevel(level_dic.get(v, level_dic[“info”])) if k == “propagate” and v: logger.propagate = int(v) # here other attributes could be added. todo self.loggers[logger_name][‘value’] = logger def __check_logger(self): _loggers = self.log_config.get(“loggers”, “keys”).split(“,”) self.loggers = {} for logger in _loggers: logger = logger.strip() if logger: logger_section_name = self.logger_prefix + logger if not self.log_config.has_section(logger_section_name): raise exception( “error: no logger section name: {0}”.format(logger_section_name)) self.loggers.setdefault(logger, {}) self.loggers[logger][“section_name”] = logger_section_name if not self.loggers: raise exception( “error: no logger keys in {0}”.format(self.log_config_file)) def __check_handler(self): _handlers = self.log_config.get(“handlers”, “keys”).split(“,”) self.handlers = {} for handler in _handlers: handler = handler.strip() if handler: handler_section_name = self.handler_prefix + handler if not self.log_config.has_section(handler_section_name): raise exception(“error: no handler section name: {0}”.format(handler_section_name)) self.handlers.setdefault(handler , {}) self.handlers[handler][“section_name”] = handler_section_name if not self.handlers: raise exception(“error: no handler keys in {0}”.format(self.log_config_file)) def __check_formatter(self): _formatters = self.log_config.get(“formatters”, “keys”).split(“,”) self.formatters = {} for formatter in _formatters: formatter = formatter.strip() if formatter: formatter_section_name = self.formatter_prefix + formatter if not self.log_config.has_section(formatter_section_name): raise exception(“error: no formatter section name: {0}”.format(formatter_section_name)) self.formatters.setdefault(formatter, {}) self.formatters[formatter][“section_name”] = formatter_section_name if not self.formatters: raise exception(“error: no formatter keys in {0}”.format(self.log_config_file)) def getlogger(self, logger_name=”root”): return self.loggers[logger_name][‘value’]
class trace(object): def __init__(self, log_config_file, log_key=”root”, log_data_file=none): self.log_config_file = log_config_file self.log_data_file = log_data_file self.log_key = log_key log = logconfig(self.log_config_file, self.log_data_file) self.logger = log.getlogger(self.log_key) def info(self, key, info): self.logger.info(“[{0}]: {1}”.format(key, info)) def error(self, key, err_info): self.logger.error(“[{0}]: {1}”.format(key, err_info)) def warn(self, key, warn_info): self.logger.warn(“[{0}]: {1}”.format(key, warn_info))
def test(): log_key = “root” t = trace(log_config_file, log_key, log_data_file) t.info(“test trace”, “ok”)
if __name__ == “__main__”: test()
log.conf
代码如下:
[loggers]keys = root, debug
[handlers]keys=consolehandler, timedrotatingfilehandler
[formatters]keys=simpleformatter
[logger_root]level=debughandlers=consolehandler, timedrotatingfilehandler
[logger_debug]level=debughandlers=consolehandlerpropagate=0
[handler_consolehandler]class=streamhandlerlevel=debugformatter=simpleformatterargs=(sys.stdout,)
[handler_timedrotatingfilehandler]./run.log”, ‘midnight’, 1, 10)
[formatter_simpleformatter]format=[%(asctime)s][%(levelname)s][%(process)d:%(thread)d][%(filename)s:%(lineno)d]:%(message)sdatefmt=%y-%m-%d %h:%m:%s