[Python-Dev] Should PEP 498 specify if rf'...' is valid? (original) (raw)

MRAB python at mrabarnett.plus.com
Mon Oct 26 15:43:53 EDT 2015

On 2015-10-26 18:45, Sven R. Kunze wrote:

On 26.10.2015 16:22, Ethan Furman wrote:

On 10/23/2015 08:20 AM, Nick Coghlan wrote:

My own objection isn't to allowing "fR" or "fbR", it's to allowing the uppercase "F".

I also don't understand why we can't say "if 'f' is part of a string prefix, it must be first". Sometimes order matters, and sometimes it does not. If the order does not have an impact on the final code, it does not matter, and making us have to remember an order that does not matter is a waste. Order that matters? You must be kidding. That would turn different types of string extremely hard to understand because semantics differ. That is, btw., one reason, why I favor a fixed order (alphabetically or something). Easy to remember and no way to misinterpret it. In Python 2, how often have you seen prefix "ur" rather than "ru"?

I always used "ur".

How often is alphabetical order used in the prefixes?

If the order isn't alphabetical, then it's going to be some order that's harder to remember, so I agree with Ethan here.

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