old_contents: #! /usr/bin/env python
  
  import os
  import yaml
  
  from utils.with_logger import WithLogger
  
  
  class Config(WithLogger):
      config_fname = "configuration.yaml"
  
      def __init__(self, config_fname=None):
          config_fname = config_fname or self.config_fname
          fo = open(config_fname, "r")
          blob = fo.read()
          fo.close()
          self.config = yaml.load(blob)
  
      def __getattr__(self, attrname):
  
          upper_attrname = attrname.upper()
          envvar = os.getenv(upper_attrname)
          if envvar is not None:
              self.logger.warning("The `%s` environment variable is deprecated in favor of the `DESTALINATOR_%s` environment variable", upper_attrname, upper_attrname)
          else:
              envvar = os.getenv('DESTALINATOR_' + upper_attrname)
          if envvar is not None:
              return [x for x in envvar.split(',') if x] if ',' in envvar else envvar
  
          return self.config.get(attrname, '')
  
      def get(self, attrname, fallback=None):
          return self.config.get(attrname, fallback)
  
  
  _config = Config()
  
  
  def get_config():
      return _config
  
  
  class WithConfig(object):
      @property
      def config(self):
          return get_config()
  
new_contents: #! /usr/bin/env python
  
  import os
  import yaml
  
  from utils.with_logger import WithLogger
  
  
  class Config(WithLogger):
      config_fname = "configuration.yaml"
  
      def __init__(self, config_fname=None):
          config_fname = config_fname or self.config_fname
          fo = open(config_fname, "r")
          blob = fo.read()
          fo.close()
          yaml=YAML(typ='safe')
          self.config = yaml.load(blob)
  
      def __getattr__(self, attrname):
  
          upper_attrname = attrname.upper()
          envvar = os.getenv(upper_attrname)
          if envvar is not None:
              self.logger.warning("The `%s` environment variable is deprecated in favor of the `DESTALINATOR_%s` environment variable", upper_attrname, upper_attrname)
          else:
              envvar = os.getenv('DESTALINATOR_' + upper_attrname)
          if envvar is not None:
              return [x for x in envvar.split(',') if x] if ',' in envvar else envvar
  
          return self.config.get(attrname, '')
  
      def get(self, attrname, fallback=None):
          return self.config.get(attrname, fallback)
  
  
  _config = Config()
  
  
  def get_config():
      return _config
  
  
  class WithConfig(object):
      @property
      def config(self):
          return get_config()
  
subject: fix for YAMLLoadWarning: calling yaml.load() without Loader=... is deprecated, as the default Loader is unsafe.