#NEWLINE# def __init__( self , data = None ) : #NEWLINE# #INDENT# '\n            >>> tl = AList([1, 2, 3])\n            >>> tl\n            <AList:[1, 2, 3]>\n            >>> tl = AList(tl)\n            >>> tl\n            <AList:[1, 2, 3]>\n        ' #NEWLINE# if ( data is None ) : #NEWLINE# #INDENT# data = [ ] #NEWLINE# #UNINDENT# else : #NEWLINE# #INDENT# if isinstance ( data , AList ) : #NEWLINE# #INDENT# data = data . _data_ #NEWLINE# #UNINDENT# #UNINDENT# self . _data_ = data