继承和单例无法正常工作

Question

具有该项目配置：

- src/
   |-- classes/
      |-- Logger.py
      |-- Browser.py
   |-- ubigeo.py
- main.py

我正在尝试使用python-logstash-logger类中的Logger.py设置来打印Browser.py类，ubigeo.py和main.py脚本中的日志：

#Logger.py
import logging, logstash

class LoggerSingleton:
  _shared_state = {}

  def __init__(self):
    self.__dict__ = self._shared_state

class Logger(LoggerSingleton):
  def __init__(self):
    LoggerSingleton.__init__(self)
    self.logger = self.init_console_logger()

  def init_console_logger(self):
    logger = logging.getLogger('python-logstash-logger')
    logger.setLevel('DEBUG')

    formatter = logging.Formatter('%(asctime)s : %(levelname)s : %(message)s')

    sh = logging.StreamHandler()
    sh.setLevel(logging.INFO)
    sh.setFormatter(formatter)

    logger.addHandler(sh)

    return logger

  def log(self, message):
    self.logger.info(message)

主要问题是，当我有多个相同类的实例时，日志会多次打印。

#main.py
from src.classes import Logger

if __name__ == "__main__":
  logger_handler = Logger()
  logger_handler.log('Checking python version...')

  ubigeo.main()

#Browser.py
from .Logger import Logger

class Browser(Config, Logger):
  def __init__(self):
    self.logger = Logger()
    self.logger.log('Setting up & launching a browser')

#ubigeo.py
from .classes.Browser import Browser

def main():
  browser_handler = Browser()

此刻的日志结果是：

2019-04-21 13:25:12,758 : INFO : Checking python version...
2019-04-21 13:25:12,915 : INFO : Setting up & launching a browser
2019-04-21 13:25:12,915 : INFO : Setting up & launching a browser

期望的结果是

2019-04-21 13:25:12,758 : INFO : Checking python version...
2019-04-21 13:25:12,915 : INFO : Setting up & launching a browser