實現了簡單版本的logging.config，支持一般的通過config文件進行配置。
感覺還有更好的方法，是直接利用logging.config.fileConfig(log_config_file)方式讀進來之后，通過修改handler方式來進行修改。

代碼如下:
"""
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"))