You are correct and I still don't know Python (sigh). Thanks
Philippe On Sat, 19 Feb 2005 15:51:18 -0500, Kent Johnson wrote: > Philippe C. Martin wrote: >> If I do this: >> >> >> >> print 'LEN OF BOOK BEFORE APPEND: ', len(pickle.dumps(self.__m_rw)) >> self.__m_rw.books.append( [p_col1,p_col2,p_col3] ) >> print 'LEN OF BOOK AFTER APPEND: ', len(pickle.dumps(self.__m_rw)) >> >> I get the same length before and after append. >> >> when I print self.__m_rw.books, I see my 'appends' in there, yet the >> pickled object does not change. > > How is __m_rw.books defined? If it is a class attribute of the class of > __m_rw you will see this > behavior. e.g. > > >>> class Mrw: > ... books = [] > ... > >>> m=Mrw() > >>> class Mrw: > ... books = [] > ... > >>> __m_rw = Mrw() > >>> __m_rw.books.append(1) > >>> __m_rw.books > [1] > > but __m_rw.books will not be pickled with __m_rw because it belongs to the > class, not the instance. > > The fix is to declare books as an instance attribute: > > class Mrw: > def __init__(self): > self.books = [] > > Kent > >> >> Any clue ? >> >> Thanks >> >> >> Philippe >> >> >> -- http://mail.python.org/mailman/listinfo/python-list
