Allow rb"" literals as an equivalent to br""

[pitrou]

BPO	13748
Nosy	@gvanrossum, @warsaw, @birkenfeld, @ncoghlan, @pitrou, @benjaminp
Files	rb.patch rb2.patch

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2012-01-12.21:48:47.512>
created_at = <Date 2012-01-09.19:14:10.269>
labels = ['interpreter-core', 'type-feature']
title = 'Allow rb"" literals as an equivalent to br""'
updated_at = <Date 2012-01-12.21:48:47.511>
user = 'https://github.com/pitrou'

bugs.python.org fields:

activity = <Date 2012-01-12.21:48:47.511>
actor = 'pitrou'
assignee = 'none'
closed = True
closed_date = <Date 2012-01-12.21:48:47.512>
closer = 'pitrou'
components = ['Interpreter Core']
creation = <Date 2012-01-09.19:14:10.269>
creator = 'pitrou'
dependencies = []
files = ['24188', '24189']
hgrepos = []
issue_num = 13748
keywords = ['patch']
message_count = 8.0
messages = ['150964', '150967', '150974', '150978', '150979', '151038', '151153', '151154']
nosy_count = 7.0
nosy_names = ['gvanrossum', 'barry', 'georg.brandl', 'ncoghlan', 'pitrou', 'benjamin.peterson', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'commit review'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue13748'
versions = ['Python 3.3']

[pitrou]

As mentioned in bpo-13744, it is not easy to remember that br"" is an allowed bytes literal but not rb"". Here is a patch to allow both forms.

[pitrou]

Updated patch with doc.

[warsaw]

On Jan 09, 2012, at 07:27 PM, Antoine Pitrou wrote:

Updated patch with doc.

Nicely done. +1

[benjaminp]

I would be happier if there was precedent for this with "ur" = "ru" in 2.x, which is not true.

[pitrou]

I would be happier if there was precedent for this with "ur" = "ru" in
2.x, which is not true.

In my experience, raw unicode literals were very rare while raw bytes
literals are quite frequent (mainly for regular expressions).

[birkenfeld]

+1 for "raw bytes", which reads much nicer to me than "bytes raw".

[python-dev]

New changeset bbed36370b08 by Antoine Pitrou in branch 'default':
Issue bpo-13748: Raw bytes literals can now be written with the rb prefix as well as br.
http://hg.python.org/cpython/rev/bbed36370b08

[pitrou]

Committed, thanks.