[Python-3000] PEP 3131 - the details (original) (raw)

James Y Knight foom at fuhm.net
Thu May 17 19:28:40 CEST 2007

On May 17, 2007, at 11:22 AM, Martin v. Löwis wrote:

While there has been a lot of discussion as to whether to accept PEP 3131 as a whole, there has been little discussion as to the specific details of the PEP. In particular, is it generally agreed that the Unicode character classes listed in the PEP are the ones we want to include in identifiers? My preference is to be conservative in terms of what's allowed. John Nagle suggested to consider UTR#39 (http://unicode.org/reports/tr39/). I encourage anybody to help me understand what it says.

I think this is not something that is appropriate for Python. It
looks fairly specific to implementing a centralized name registry
(say: DNS). Specifically, the backwards compatibility is not
appropriate, as it doesn't guarantee that a name valid now will be
valid in the future. They point out that that is okay for DNS, where
the rules can be applied at name-registration time, and previously- registered names can continue to be used.

James

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