[issue1604] collections.deque.__init__ doesn't initialize

[Neil Cerutti]

New submission from Neil Cerutti:

Passing an interable to the __init__ method of an existing deque 
appends those elements, rather than reinitializing the deque with the 
items. This is contrary to how list.__init__ works.

test_deque.py verifies the (possibly) incorrect behavior.

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components: Library (Lib)
messages: 58501
nosy: Horpner, rhettinger
severity: normal
status: open
title: collections.deque.__init__ doesn't initialize
type: behavior
versions: Python 2.5

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Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1604>
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