old_contents: import yaml
  from oonib import errors as e
  from oonib import Storage
  from oonib import __version__
  
  from oonib.options import OONIBOptions
  import os
  
  class Config(object):
      main = None
      helpers = None
      reports = {}
      backend_version = __version__
      opts = OONIBOptions()
  
      def __init__(self):
          self.opts.parseOptions()
  
      def load(self):
          try:
              config_file = self.opts['config']
          except KeyError:
              raise e.ConfigFileNotSpecified
  
          try:
              with open(config_file) as f:
                  configuration = yaml.safe_load(f)
          except IOError:
              raise e.ConfigFileDoesNotExist(config_file)
  
          self.main = Storage(configuration['main'].items())
  
          self.helpers = Storage()
          for name, helper in configuration['helpers'].items():
              self.helpers[name] = Storage(helper.items())
  
          self.check_paths()
      
      def check_paths(self):
          def check_path(directory, complaint):
              if not (directory and os.path.isdir(directory)):
                  raise complaint(directory)
          check_path(self.main.report_dir,  e.InvalidReportDirectory)
          check_path(self.main.archive_dir, e.InvalidArchiveDirectory)
          check_path(self.main.input_dir,   e.InvalidInputDirectory)
          check_path(self.main.deck_dir,    e.InvalidDeckDirectory)
  
  backend_version = __version__
  reports = {}
  
  config = Config()
  
new_contents: import yaml
  from oonib import errors as e
  from oonib import Storage
  from oonib import __version__
  
  from oonib.options import OONIBOptions
  import os
  
  class Config(object):
      main = None
      helpers = None
      reports = {}
      backend_version = __version__
      opts = OONIBOptions()
  
      def __init__(self):
          self.opts.parseOptions()
  
      def load(self):
          try:
              config_file = self.opts['config']
          except KeyError:
              raise e.ConfigFileNotSpecified
  
          try:
              with open(config_file) as f:
                  configuration = yaml.safe_load(f)
          except IOError:
              raise e.ConfigFileDoesNotExist(config_file)
  
          self.main = Storage(configuration['main'].items())
  
          self.helpers = Storage()
          for name, helper in configuration['helpers'].items():
              self.helpers[name] = Storage(helper.items())
  
          self.check_paths()
      
      def check_paths(self):
          def check_path(directory, complaint):
              if not (directory and os.path.isdir(directory)):
                  raise complaint(directory)
          check_path(self.main.report_dir,  e.InvalidReportDirectory)
          check_path(self.main.archive_dir, e.InvalidArchiveDirectory)
          check_path(self.main.input_dir,   e.InvalidInputDirectory)
          check_path(self.main.deck_dir,    e.InvalidDeckDirectory)
  
  backend_version = __version__
  
  config = Config()
  
subject: remove unused (and confusing) global