#NEWLINE# def __init__( self , name = None ) : #NEWLINE# #INDENT# self . name = name #NEWLINE# if ( not hasattr ( self . __class__ , 'parents' ) ) : #NEWLINE# #INDENT# self . parents = set ( ) #NEWLINE# #UNINDENT# if ( not hasattr ( self . __class__ , 'children' ) ) : #NEWLINE# #INDENT# self . children = set ( ) #NEWLINE# #UNINDENT# RoleMixin . roles [ name ] = self