I concur. I've also been bitten by forgetting Py_CHARMASK, so a single
version that took this into account (and was locale-unaware) would be
welcome.

In private mail I'd mentioned that if these are functions, they should
take int. But I now think that's incorrect, and they should take char or
unsigned char. I think the standard C functions take int because they
also allow EOF. I think the Py_ versions should allow only characters
and not allow EOF. Py_CHARMASK already enforces this, anyway, with
likely undefined results.