Path: csiph.com!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed1a.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.004 X-Spam-Evidence: '*H*': 0.99; '*S*': 0.00; 'from:charset:iso-8859-2': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'valueerror:': 0.09; 'aggregation,': 0.16; 'behave': 0.16; 'copying.': 0.16; 'overridden': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'redundant': 0.16; 'simpson': 0.16; 'subclass': 0.16; 'subclassing': 0.16; 'writable': 0.16; 'wrote:': 0.18; 'header:User-Agent:1': 0.23; 'performing': 0.26; 'least': 0.26; 'header:X-Complaints-To:1': 0.27; 'header:In-Reply- To:1': 0.27; 'idea': 0.28; 'have,': 0.30; 'subject:from': 0.34; 'but': 0.35; 'there': 0.35; 'doing': 0.36; 'implement': 0.38; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'how': 0.40; 'then,': 0.60; 'charset:iso-8859-2': 0.64; 'received:93': 0.72; 'subject:get': 0.81; 'received:hr': 0.84; 'thing...': 0.84 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: =?ISO-8859-2?Q?Juraj_Ivan=E8i=E6?= Subject: Re: how to get bytes from bytearray without copying Date: Mon, 03 Mar 2014 09:15:00 +0100 References: <20140303004458.GA73815@cskk.homeip.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: 93-136-72-166.adsl.net.t-com.hr User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 In-Reply-To: <20140303004458.GA73815@cskk.homeip.net> X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 14 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1393834521 news.xs4all.nl 2886 [2001:888:2000:d::a6]:53703 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:67517 On 3.3.2014. 1:44, Cameron Simpson wrote: >> ValueError: cannot hash writable memoryview object > > Have you considered subclassing memoryview and giving the subclass > a __hash__ method? I have, and then, when I failed to subclass it, I considered doing aggregation, and make it behave byte-like. But how to implement the overridden __hash__ method? It will still require at least *some* redundant copying. And there is the slicing thing... the whole idea started to feel like I was performing tonsillectomy through the anal cavity.