[Python-Dev] Unexpected bytecode difference

Victor Stinner victor.stinner at gmail.com
Fri Jan 19 19:18:59 EST 2018


It seems like the EXTENDED_ARG doc wasn't updated.

Victor

2018-01-20 1:07 GMT+01:00 Alexander Belopolsky <alexander.belopolsky at gmail.com>:
> On Fri, Jan 19, 2018 at 7:01 PM, Guido van Rossum <guido at python.org> wrote:
>> Presumably because Python 3 switched to wordcode. Applying dis.dis() to
>> these code objects results in the same output.
>>
>>>>> dis.dis(c)
>>           0 LOAD_NAME           0 (0)
>>           3 RETURN_VALUE
>
> I expected these changes to be documented at
> <https://docs.python.org/3/library/dis.html>, but the EXTENDED_ARG
> section, for example, is the same in the 2 and 3 versions and says
> that the default argument is two bytes.
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