The answer bytes == str is just False. That doesn't put b'' in your database by accident. It could be useful to separate the two kinds of warnings.
On Fri, Jun 21, 2019, 18:57 Ivan Pozdeev via Python-Dev < python-dev@python.org> wrote: > On 22.06.2019 1:08, Daniel Holth wrote: > > Thanks. I think I might like an option to disable str(bytes) without > disabling str != bytes. Unless the second operation would also corrupt > output. > > You can't compare str to bytes without knowing the encoding the bytes are > supposed to be in (see > https://stackoverflow.com/questions/49991870/python-default-string-encoding > for details). > > And if you do know the encoding, you can as well compare > `str.encode(encoding) != bytes` / `str != bytes.decode(encoding)`. > > > Came across this kind of set in the hyper http library which uses a set to > accept certain headers with either str or bytes keys. > > On Tue, Jun 18, 2019, 13:05 Christian Heimes <christ...@python.org> wrote: > >> On 18/06/2019 18.32, Daniel Holth wrote: >> > set([u"foo", b"foo]) will error because the two kinds of string have the >> > same hash, and this causes a comparison. Is that correct? >> >> Yes, it will fail with -bb, because it turns comparison between str and >> bytes into an error. This can also happen with other strings when >> hash(u'somestring') & mask == hash(b'otherbytes') & mask. The mask of a >> set starts with PySet_MINSIZE - 1 == 8 and increases over team. >> >> Christian >> >> >> _______________________________________________ >> 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/ZIF2MRBWSMSCFP6E7PZOBI5KYP46QZPK/ >> > > _______________________________________________ > Python-Dev mailing list -- python-dev@python.org > To unsubscribe send an email to > python-dev-leave@python.orghttps://mail.python.org/mailman3/lists/python-dev.python.org/ > Message archived at > https://mail.python.org/archives/list/python-dev@python.org/message/R6E7FAR36UO6XHQSIAVF4DIM7G23ADJP/ > > -- > Regards, > Ivan > > _______________________________________________ > 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/XAN44UH5X5PYNSHY5ONULXIJF4DLBXF6/ >
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