[Python-Dev] Revised decimal type PEP
Tue, 31 Jul 2001 14:07:02 -0700 (PDT)
Michael McLay wrote:
> I had originally expected the context for decimal calculations to be
> the module in which a statement is defined. If a function defined
> in another module is called the rules of that other module would be
> applied to that part of the calculation. My expectations of how
> Python would work with decimal numbers doesn't seem to match what
> Guido said about his conversation with Tim, and what you said in this
> How can the rules for using decimals be stated so that a newbie can
> understand what they should expect to happen? We could set a default
> precision of 17 digits and all calculations that were not exact would
> be rounded to 17 digits. This would match how their calculator works.
> I would think this would be the model with the least suprises. For
> someone needing to be more precise, or less precise, how would this
> rule be modified?
I intend to have more discussions with Cowlishaw once I finish
implementing his spec, but I suspect his answer will be that whoever
calls the module should set the precision.
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