gistfile1.py

class PersistanceContextManager(object):

   def create():
      # prepare list_of_ctx
      # self._create(list)
     
      created_ctxt = []
      try:
         for ctx in list_of_ctx:
           created_ctxt.append(ctx)
           ctx.setup()

      except:
          for ctx in reverse(created_ctx):
            try:
                ctx.clenaup()
            except: 
                pass
          
          raise exceptions.ContextFailedToCreate()


   def cleanup():
       pass