python改变日志(logging)存放位置的示例
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。
"""
project trace system
"""
import sys
import configparser
import logging
import logging.config
import 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
[loggers]
keys = root, debug
[handlers]
keys=consolehandler, timedrotatingfilehandler
[formatters]
keys=simpleformatter
[logger_root]
level=debug
handlers=consolehandler, timedrotatingfilehandler
[logger_debug]
level=debug
handlers=consolehandler
propagate=0
[handler_consolehandler]
class=streamhandler
level=debug
formatter=simpleformatter
args=(sys.stdout,)
[handler_timedrotatingfilehandler]
class=handlers.timedrotatingfilehandler
level=debug
formatter=simpleformatter
args=("./run.log", 'midnight', 1, 10)
[formatter_simpleformatter]
format=[%(asctime)s][%(levelname)s][%(process)d:%(thread)d][%(filename)s:%(lineno)d]:%(message)s
datefmt=%y-%m-%d %h:%m:%s
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