Python bytecode format changed deeply in Python 3.6. It now uses regular units of 2 bytes, instead of 1 or 3 bytes depending if the instruction has an argument.
See for example https://bugs.python.org/issue26647 "wordcode". But CALL_FUNCTION bytecode also evolved. Victor 2018-01-20 0:46 GMT+01:00 Alexander Belopolsky <alexander.belopol...@gmail.com>: > I have encountered the following difference between Python 3 and 2: > > (py3) >>>> compile('xxx', '<>', 'eval').co_code > b'e\x00S\x00' > > (py2) >>>> compile('xxx', '<>', 'eval').co_code > 'e\x00\x00S' > > Note that 'S' (the code for RETURN_VALUE) and a zero byte are swapped > in Python 2 compared to Python 3. Is this change documented > somewhere? > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > https://mail.python.org/mailman/options/python-dev/victor.stinner%40gmail.com _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
