[PATCH] Add set operations (and, or, xor, subtract) to dict views

[keir]

BPO	1017
Files	dictview_set_operations.diff dictview_tests.diff

^{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 = 'https://github.com/gvanrossum'
closed_at = <Date 2007-08-25.00:14:24.055>
created_at = <Date 2007-08-24.23:23:25.342>
labels = ['interpreter-core']
title = '[PATCH] Add set operations (and, or, xor, subtract) to dict views'
updated_at = <Date 2007-09-02.20:04:52.338>
user = 'https://bugs.python.org/keir'

bugs.python.org fields:

activity = <Date 2007-09-02.20:04:52.338>
actor = 'loewis'
assignee = 'gvanrossum'
closed = True
closed_date = <Date 2007-08-25.00:14:24.055>
closer = 'gvanrossum'
components = ['Interpreter Core']
creation = <Date 2007-08-24.23:23:25.342>
creator = 'keir'
dependencies = []
files = ['8311', '8312']
hgrepos = []
issue_num = 1017
keywords = ['patch']
message_count = 1.0
messages = ['55280']
nosy_count = 1.0
nosy_names = ['keir']
pr_nums = []
priority = 'normal'
resolution = 'accepted'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue1017'
versions = ['Python 3.0']

[keir]

This patch adds set operations & | ^ - to dict views ({}.keys(),
{}.items()). A set is returned.