content: 
  __all__ = ['BaseLoader', 'SafeLoader', 'Loader']
  
  from reader import *
  from scanner import *
  from parser import *
  from composer import *
  from constructor import *
  from resolver import *
  
  class BaseLoader(Reader, Scanner, Parser, Composer, BaseConstructor, BaseResolver):
  
      def __init__(self, stream):
          Reader.__init__(self, stream)
          Scanner.__init__(self)
          Parser.__init__(self)
          Composer.__init__(self)
          BaseConstructor.__init__(self)
          BaseResolver.__init__(self)
  
  class SafeLoader(Reader, Scanner, Parser, Composer, SafeConstructor, Resolver):
  
      def __init__(self, stream):
          Reader.__init__(self, stream)
          Scanner.__init__(self)
          Parser.__init__(self)
          Composer.__init__(self)
          SafeConstructor.__init__(self)
          Resolver.__init__(self)
  
  class Loader(Reader, Scanner, Parser, Composer, Constructor, Resolver):
  
      def __init__(self, stream):
          Reader.__init__(self, stream)
          Scanner.__init__(self)
          Parser.__init__(self)
          Composer.__init__(self)
          Constructor.__init__(self)
          Resolver.__init__(self)
  
  