new_contents: import logging
  
  class MyFilter(object):
  
      def __init__(self, level):
          self.__level = level
  
      def filter(self, logRecord):
          # https://docs.python.org/3/library/logging.html#logrecord-attributes
          return logRecord.levelno == self.__level
  
  basic_config = {
      "level": logging.DEBUG,
      "format": '%(asctime)s %(name)-12s %(levelname)-8s %(message)s',
      "filename": 'log/debug.log',
      "filemode": 'w'
  }
  logging.basicConfig(**basic_config)
  
  logging.info('Jackdaws love my big sphinx of quartz.')
  
  console = logging.StreamHandler()
  console.setLevel(logging.INFO)
  formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s')
  console.setFormatter(formatter)
  
  logger1 = logging.getLogger('myapp.area1')
  logger2 = logging.getLogger('myapp.area2')
  logger1.addHandler(console)
  my_filter = MyFilter(logging.ERROR)
  logger2.addFilter(my_filter)
  
  logger1.debug('Quick zephyrs blow, vexing daft Jim.')
  logger2.info('How quickly daft jumping zebras vex.')
  logger1.warning('Jail zesty vixen who grabbed pay from quack.')
  logger2.error('The five boxing wizards jump quickly.')
subject: Add a more complex example