[Python-ideas] Trigonometry in degrees

Michael Selik mike at selik.org
Sat Jun 9 10:46:34 EDT 2018

On Sat, Jun 9, 2018 at 2:22 AM Adam Bartoš <drekin at gmail.com> wrote:

> The idea was that the functions could handle the PiMultiple instances in a special way and fall back to float only when a special value is not detected. It would be like the proposed dsin functionality, but with a magic class instead of a new set of functions, and without a particular choice of granularity (360 degrees).
> But maybe it isn't worth it. Also what about acos(0)? Should it return PiMultiple(1, 2) and confuse people or just 1.5707963267948966 and loose exactness?
> That'd be the only module in the standard library with such a specialized
class and behavior. You could argue that pathlib creates a sort of Path
preference with str fallback, but the Path type has a large collection of
methods. In contrast, this PiMultiple type would be only used as an input.
That's very unusual style for Python.
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