Message 239594 - Python tracker (original) (raw)

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.

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.

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.