old_contents: __author__ = u'schmatz'
  
  from configuration import Configuration
  
  class Dependency(object):
      def __init__(self,configuration):
          assert isinstance(configuration,Configuration)
          self.config = configuration
      def download_dependencies(self):
          raise NotImplementedError
      def install_dependencies(self):
          raise NotImplementedError
  
  
new_contents: __author__ = u'schmatz'
  
  from configuration import Configuration
  
  class Dependency(object):
      def __init__(self,configuration):
          assert isinstance(configuration,Configuration)
          self.config = configuration
      def download_dependencies(self):
          raise NotImplementedError
      def install_dependencies(self):
          raise NotImplementedError
  
subject: Update dependency.py