[Tino Wildenhain] > ... > Btw, (hijacking the thread because a bit related) how can I serialize the > state of a generator object? (e.g. for caching it between requests) > Pickle does not work for it (whyever)
You cannot. A generator-iterator contains (among other things) a Python stack frame, and you can't even serialize one of those by itself (let alone a generator containing one). For that matter, a Python stack frame contains a Python code object and a Python thread state, which latter includes addresses of C functions and a Python interpreter state, which in turn contains a linked list of Python thread states ... there's nothing on Earth _less_ serializable than a generator ;-). That goes beyond "serializing code" to "serializing code and its current execution state in midstream" too. It's possible that PyPy will (or already has) a kind of object space in which this is possible, but I don't except it will ever be possible in CPython. _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
