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> For this purpose it is appropriate to use a special converter
> (with 'O&').
The converter works--but, then, a similar converter would also work
for double, and float, and long long and many others. If long long
is special enough to merit explicit support in PyArg_ParseTuple,
then bool definitely is, as I strongly suspect bool is used much more
frequently.
> I suppose it must be a strict сonverter; there is no point
> in specifying followlinks=[1, 2, 3].
I don't see a need for that either, but--where would you draw the line? What is the principle that says "ints are okay, floats are... okay, lists are not"?
Python has a long-established concept of the "truthiness" of an expression. I *strongly* suggest we stick with that unless we have a *very* good reason why not.
> note that 'b' and 'B' are already used.
I'm a moron! I must have looked right at it and it didn't register.
't' (truth) and 'f' (false) are also taken. As is 'c' (conditional).
The only thing I can come up with that's remotely related and
isn't already taken is 'p' for predicate.
> It is better first to use the сonverter, and expand the format
> only when the enough number of uses.
I suspect there are already loads of places in the standard library
that should be using this rather than abusing 'i'.