[Python-Dev] Cloning threading.py using proccesses
"Martin v. Löwis"
martin at v.loewis.de
Sun Oct 15 14:59:57 CEST 2006
Fredrik Lundh schrieb:
> but given that the format *has* been stable for many years, surely it
> would make more sense to just codify that fact, rather than developing
> Yet Another Serialization Format instead?
There have been minor changes over time, e.g. r26146 (gvanrossum)
introduced TYPE_TRUE and TYPE_FALSE, r36242 (loewis) introduced
TYPE_INTERNED and TYPE_STRINGREF, and r38266 (rhettinger) introduced
TYPE_SET and TYPE_FROZENSET.
With these changes, old dumps can load in new versions, but not vice
Furthermore, r27219 (nnorwitz) changed the co_argcount, co_nlocals,
co_stacksize, co_flags, and co_firstlineno fields from short to long;
unmarshalling from an old version would just crash/read garbage.
So how would you propose to deal with such changes in the future?
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