Tuomas Suutari added the comment: On 30 March 2015 at 13:49, Stefan Krah wrote: > Regarding Decimal: > > 1) The context precision isn't used for formatting. If you have > another reason for proposing the optional context argument for > dec_format(), please open another issue.
Yes, context precision isn't, but context rounding mode is. That's why I wanted to use a known context rather than the current (thread-local) context. But yes, I also thought that maybe the Decimal.__format__ changes should go to another issue, which my implementation would then depend on though. It wouldn't be too bad if Py and C version of Decimal.__format__ had same interface. What do you think? > 2) There's another problem: The mythical DefaultContext (which > acts as a template for creating new contexts) affects not only > new thread-local contexts, but also a new Context()! > > In my opinion this is something we should change: The mechanism > is fine for thread-local contexts, but Context() should behave > like a pure function. I don't understand what do you mean with this. Is this something that I'm doing wrong in my patch or just another (related?) issue? > 3) The double rounding issues are more tricky than it might seem; > if we use Decimal for this, perhaps direct support in the module > would be the cleanest option. What double rounding issues you're referring to? ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue23602> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
