> PEP 425 explicitly covers that.
It says "The version is py_version_nodot. CPython gets away with no dot, but if
one is needed the underscore _ is used instead. PyPy should probably use its
own versions here pp18, pp19".
The "probably" leaves some room for doubt as to what exactly is meant: both
wheel and distlib use py_version_nodot, and the last sentence I quoted looks
provisional rather than definitive.
Regards,
Vinay Sajip
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