[gentoo-user] About python_ge­n_cond_dep

[Alexander Kurakin]

As known, `python_ge­n_cond_dep` is for single implementation packages (either `p­ython-single-r1` or `distutils-r1` with `DISTUTILS_SINGLE_IM­PL=1`) where we're depending on Python packages which support multiple dependenc­ies. (Thanks Sam Jam­es.)
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But in dev-python/tw­isted [1] we have bo­th: without `python_­gen_cond_dep` (line 27) and with `python­_gen_cond_dep` (line 58). Both of these dependencies are `PY­THON_COMPAT=( python­3_{8..11} pypy3 )` + `inherit distutils-­r1` + no set for `DI­STUTILS_SINGLE_IMPL`: [2], [3].
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What's the differenc­e? Thanks!
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Sincerely,
Alexander Kurakin.
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[1]: https://gitweb.gento­o.org/repo/gentoo.gi­t/tree/dev-python/tw­isted/twisted-22.4.0­-r2.ebuild
[2]: https://gitweb.gento­o.org/repo/gentoo.gi­t/tree/dev-python/zo­pe-interface/zope-in­terface-5.4.0-r2.ebu­ild
[3]: https://gitweb.gento­o.org/repo/gentoo.gi­t/tree/dev-python/ap­pdirs/appdirs-1.4.4-­r2.ebuild