old_contents: import os
  from configparser import ConfigParser
  
  from core.constants import YETI_ROOT
  
  
  class Dictionary(dict):
  
      def __getattr__(self, key):
          return self.get(key, None)
  
      __setattr__ = dict.__setitem__
      __delattr__ = dict.__delitem__
  
  
  class Config:
  
      def __init__(self):
          config = ConfigParser(allow_no_value=True)
          config.read(os.path.join(YETI_ROOT, "yeti.conf"), encoding='utf-8')
  
          for section in config.sections():
              setattr(self, section, Dictionary())
              for name in config.options(section):
                  try:
                      value = config.getint(section, name)
                  except ValueError:
                      try:
                          value = config.getboolean(section, name)
                      except ValueError:
                          value = config.get(section, name)
  
                  getattr(self, section)[name] = value
  
      def __getitem__(self, key):
          return getattr(self, key)
  
      def set_default_value(self, section, key, value):
          if not hasattr(self, section):
              setattr(self, section, Dictionary())
  
          if key not in self[section]:
              self[section][key] = value
  
      def get(self, section, key, default=None):
          if not hasattr(self, section) or key not in self[section]:
              return default
          else:
              return self[section][key]
  
  
  yeti_config = Config()
  yeti_config.set_default_value('auth', 'module', 'local')
  yeti_config.set_default_value('auth', 'apache_variable', 'REMOTE_USER')
  yeti_config.set_default_value('mongodb', 'host', '127.0.0.1')
  yeti_config.set_default_value('mongodb', 'port', 27017)
  yeti_config.set_default_value('mongodb', 'database', 'yeti')
  yeti_config.set_default_value('mongodb', 'username', None)
  yeti_config.set_default_value('mongodb', 'password', None)
  yeti_config.set_default_value('redis', 'host', '127.0.0.1')
  yeti_config.set_default_value('redis', 'port', 6379)
  yeti_config.set_default_value('redis', 'database', 0)
  yeti_config.set_default_value('proxy', 'http', None)
  yeti_config.set_default_value('proxy', 'https', None)
  yeti_config.set_default_value('logging', 'filename', '/var/log/yeti/user_activity.log')
  
new_contents: import os
  from configparser import ConfigParser
  
  from core.constants import YETI_ROOT
  
  
  class Dictionary(dict):
      def __getattr__(self, key):
          return self.get(key, None)
  
      __setattr__ = dict.__setitem__
      __delattr__ = dict.__delitem__
  
  
  class Config:
      def __init__(self):
          config = ConfigParser(allow_no_value=True)
          config.read(os.path.join(YETI_ROOT, "yeti.conf"), encoding="utf-8")
  
          for section in config.sections():
              setattr(self, section, Dictionary())
              for name in config.options(section):
                  try:
                      value = config.getint(section, name)
                  except ValueError:
                      try:
                          value = config.getboolean(section, name)
                      except ValueError:
                          value = config.get(section, name)
  
                  getattr(self, section)[name] = value
  
      def __getitem__(self, key):
          return getattr(self, key)
  
      def set_default_value(self, section, key, value):
          if not hasattr(self, section):
              setattr(self, section, Dictionary())
  
          if key not in self[section]:
              self[section][key] = value
  
      def get(self, section, key, default=None):
          if not hasattr(self, section) or key not in self[section]:
              return default
          else:
              return self[section][key]
  
  
  yeti_config = Config()
  yeti_config.set_default_value("auth", "module", "local")
  yeti_config.set_default_value("auth", "apache_variable", "REMOTE_USER")
  yeti_config.set_default_value("mongodb", "host", "127.0.0.1")
  yeti_config.set_default_value("mongodb", "port", 27017)
  yeti_config.set_default_value("mongodb", "database", "yeti")
  yeti_config.set_default_value("mongodb", "username", None)
  yeti_config.set_default_value("mongodb", "password", None)
  yeti_config.set_default_value("redis", "host", "127.0.0.1")
  yeti_config.set_default_value("redis", "port", 6379)
  yeti_config.set_default_value("redis", "database", 0)
  yeti_config.set_default_value("proxy", "http", None)
  yeti_config.set_default_value("proxy", "https", None)
  yeti_config.set_default_value("logging", "filename", "/var/log/yeti/user_activity.log")
  
subject: Update config.py