def get_reader_class(reader_name):
 reader_name = reader_name.lower()
 if (reader_name in _reader_aliases):
  reader_name = _reader_aliases[reader_name]
 try:
  module = __import__(reader_name, globals(), locals(), level=1)
 except ImportError:
  module = __import__(reader_name, globals(), locals(), level=0)
 return module.Reader

def get_reader_class ( reader_name ) : reader_name = reader_name . lower ( ) if ( reader_name in _reader_aliases ) : reader_name = _reader_aliases [ reader_name ] try : module = __import__ ( reader_name , globals ( ) , locals ( ) , level = 1 ) except ImportError : module = __import__ ( reader_name , globals ( ) , locals ( ) , level = 0 ) return module . Reader
return the reader class from the reader_name module .