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

[Eric V. Smith]

On Oct 27, 2015, at 4:39 PM, Mark Lawrence <breamoreboy at yahoo.co.uk> wrote:
> 
>> On 27/10/2015 18:39, Sven R. Kunze wrote:
>>> On 26.10.2015 20:54, Ethan Furman wrote:
>>> You misunderstand -- the order of string prefixes does *not* matter,
>>> so forcing us to use one is silly.
>> 
>> I don't think so.
>> 
>> It's better to have less possibilities in the beginning. So later on, we
>> can easily relax the restrictions without breaking compatibility.
>> 
>> Best,
>> Sven
> 
> Please no.  Having a memory much like a bottomless sieve I have no intention of reading the manual every time I need to use string prefixes.  Would the table listing "string prefix precedence" in The Fine Docs™ be unique in the programming world?

Plus, it's too late for this. What would the manual say: "either br or rb is okay, but you if you want fbr you can't spell it frb."? (Assuming we add binary f-strings.)

Let's just leave it as any order, and with any capitalization.

Eric.