#NEWLINE# def __init__( self , iterable = None ) : #NEWLINE# #INDENT# check_deterministic ( iterable ) #NEWLINE# self . __root = root = Link ( ) #NEWLINE# root . prev = root . next = weakref . ref ( root ) #NEWLINE# self . __map = { #NEWLINE# #INDENT# #NEWLINE# #UNINDENT# } #NEWLINE# if ( iterable is not None ) : #NEWLINE# #INDENT# self |= iterable