Add syntax for dynamic attribute access

[bennorth]

BPO	1657573
Nosy	@bennorth
Files	dynamic-attributes.patch.trunk.20070211: Patch against SVN trunk as of 20070211

^{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 2007-03-06.09:59:31.000>
created_at = <Date 2007-02-11.23:00:43.000>
labels = ['interpreter-core']
title = 'Add syntax for dynamic attribute access'
updated_at = <Date 2007-03-06.09:59:31.000>
user = 'https://github.com/bennorth'

bugs.python.org fields:

activity = <Date 2007-03-06.09:59:31.000>
actor = 'bennorth'
assignee = 'none'
closed = True
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2007-02-11.23:00:43.000>
creator = 'bennorth'
dependencies = []
files = ['7758']
hgrepos = []
issue_num = 1657573
keywords = ['patch']
message_count = 2.0
messages = ['51857', '51858']
nosy_count = 1.0
nosy_names = ['bennorth']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue1657573'
versions = ['Python 2.6']

[bennorth]

Add syntax to allow easier access to attributes when
attribute name known only at run-time. E.g., replace

setattr(obj, attr_name, getattr(obj, attr_name) + 1)

with

obj.(attr_name) += 1

For further discussion, see PEP-363 [PROVISIONAL NUMBER]

[bennorth]

PEP rejected; closing patch.