Sorry for the brainfart earlier. We've got a discussion in our "ideas" database already about this, start reading here: https://github.com/faster-cpython/ideas/issues/16#issuecomment-881439738
On Sun, Oct 10, 2021 at 2:55 PM Dennis Sweeney <sweeney.dennis...@gmail.com> wrote: > STORE_FAST can also be caused by the assignment to a loop variable, so > STORE/LOAD pairs can come about with things like this: > > >>> def f(): > ... for x in stuff: > ... x.work() > ... > ... > >>> from dis import dis > >>> dis(f) > 2 0 LOAD_GLOBAL 0 (stuff) > 2 GET_ITER > >> 4 FOR_ITER 6 (to 18) > 6 STORE_FAST 0 (x) > > 3 8 LOAD_FAST 0 (x) > 10 LOAD_METHOD 1 (work) > 12 CALL_METHOD 0 > 14 POP_TOP > 16 JUMP_ABSOLUTE 2 (to 4) > > 2 >> 18 LOAD_CONST 0 (None) > 20 RETURN_VALUE > > I'd guess that they'd be somewhat common in comprehensions too: > > >>> dis(x**2 for x in range(1000)) > 0 GEN_START 0 > > 1 2 LOAD_FAST 0 (.0) > >> 4 FOR_ITER 7 (to 20) > 6 STORE_FAST 1 (x) > 8 LOAD_FAST 1 (x) > 10 LOAD_CONST 0 (2) > 12 BINARY_POWER > 14 YIELD_VALUE > 16 POP_TOP > 18 JUMP_ABSOLUTE 2 (to 4) > >> 20 LOAD_CONST 1 (None) > 22 RETURN_VALUE > > > In fact, there's already a bpo issue from 2019: > https://bugs.python.org/issue38381 > _______________________________________________ > Python-Dev mailing list -- python-dev@python.org > To unsubscribe send an email to python-dev-le...@python.org > https://mail.python.org/mailman3/lists/python-dev.python.org/ > Message archived at > https://mail.python.org/archives/list/python-dev@python.org/message/73BMYW3TY7PJB7KRQ3Q3OROGU5UJVJAW/ > Code of Conduct: http://python.org/psf/codeofconduct/ > -- --Guido van Rossum (python.org/~guido) *Pronouns: he/him **(why is my pronoun here?)* <http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
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