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Path: ...!weretis.net!feeder9.news.weretis.net!2.eu.feeder.erje.net!feeder.erje.net!fu-berlin.de!uni-berlin.de!not-for-mail From: Thomas Passin <list1@tompassin.net> Newsgroups: comp.lang.python Subject: Re: Two aces up Python's sleeve (Posting On Python-List Prohibited) Date: Fri, 8 Nov 2024 17:00:31 -0500 Lines: 76 Message-ID: <mailman.89.1731115813.4695.python-list@python.org> References: <seven-20241106014329@ram.dialup.fu-berlin.de> <vgg5dn$ij48$1@solani.org> <050c2ce9efd8442fb902ecc926afb1ee42fe6c34.camel@tilde.green> <vgjoe9$2stii$2@dont-email.me> <vgjq77$aj8c$1@solani.org> <59a78893-d96a-4f5b-921f-5ad862449ca2@DancesWithMice.info> <5b6c9d39-2a1a-4554-8cd8-da123411eb81@tompassin.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: news.uni-berlin.de Rh8fsO/rGztXTR3AYkXq7Q2PyqU3NAS+4NInG7QzxMQQ== Cancel-Lock: sha1:hm8s8FksLn5fun0niLMdMXKsQxg= sha256:Huju9Y34CCt2qHpNxyyPn/vX50siqb0BAc94DXMALjA= Return-Path: <list1@tompassin.net> X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org Authentication-Results: mail.python.org; 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a=rsa-sha256; c=relaxed/relaxed; d=tompassin.net; s=dreamhost; t=1731103233; bh=S8IcJ9ieTc0CHpnIz6rSM5/dqUXnbVlj4pEVUNYDia4=; h=Date:Subject:To:From:Content-Type:Content-Transfer-Encoding; b=En7T/88QpNxFOyjJfd4EvGSrQ+DL/8P2n72a8OxVve978hRB/90QLyIHYrqlNWcfj 6rGlJy64oe1JR1CL54d3WcembCjJc31EaeUrNxV06x8ERoIYKhm+kWUbwu8LSWq1Jx H5tkfdwh6s9BWzkEtRbFMbacqAiOM5HCt2e4IlocLfc4q4CMnZqtAcCt1My2TY8I5/ brBT/KO1Imlv2jgmT2J8hAE6ZUtMroGsy7HeQ8uZG2lznhGnP3aDwyFh1yYMSF49tw sv9+9GoSluAmmlnZ9FawEg1Mt2Yxy6Qz/uQUj2QMOlMMyw4NWTvM5/AAFuqDZ3a+VS 4vOxEqFx5h3Sg== User-Agent: Mozilla Thunderbird Content-Language: en-US In-Reply-To: <59a78893-d96a-4f5b-921f-5ad862449ca2@DancesWithMice.info> X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: General discussion list for the Python programming language <python-list.python.org> List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe> List-Archive: <https://mail.python.org/pipermail/python-list/> List-Post: <mailto:python-list@python.org> List-Help: <mailto:python-list-request@python.org?subject=help> List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe> X-Mailman-Original-Message-ID: <5b6c9d39-2a1a-4554-8cd8-da123411eb81@tompassin.net> X-Mailman-Original-References: <seven-20241106014329@ram.dialup.fu-berlin.de> <vgg5dn$ij48$1@solani.org> <050c2ce9efd8442fb902ecc926afb1ee42fe6c34.camel@tilde.green> <vgjoe9$2stii$2@dont-email.me> <vgjq77$aj8c$1@solani.org> <59a78893-d96a-4f5b-921f-5ad862449ca2@DancesWithMice.info> Bytes: 7995 On 11/8/2024 2:09 PM, dn via Python-list wrote: > On 8/11/24 14:40, Mild Shock via Python-list wrote: >> Well you can use your Browser, since >> JavaScript understand post and pre increment: > > Question: are we talking Python or JavaScript? > > >> So we have x ++ equals in Python: > > Trying to find a word-for-word translation serves as badly in computer- > programming languages as it does in human spoken-languages. Learn how to > adapt and embrace the differences... > > >> x + = 1 >> x - 1 > > The above probably only 'works' (the way you expect) in the REPL. > > >> But I don't know how to combine an >> assignment and an expression into one >> expession. In JavaScript one can use > > Again! > > "Everything should be made as simple as possible, but no simpler." > > Check out "The Zen of Python" and PEP-0008 for Python idioms. > > >> the comma: >> >> > x = 5 >> 5 >> > y = (x += 1, x - 1) >> 5 >> > x = 5 >> 5 >> > y = (x += 1, x) >> 6 >> >> But in Python the comma would create a tuple. > > Exactly, just as driving on the left side of the road will be fine in > some countries but cause a crash in others. Learn the local rules FIRST! > > > The 'walrus operator' could be applied: > > >>> x = 5 > >>> y = (x := x + 1); x > 6 > >>> x, y > (6, 6) > > However, if such were submitted for Code Review, unhappiness would result. > > > Was the question re-phrased to: how to ... in Python, we'd end-up with > something more like this: > > >>> x = 5 # define > >>> x += 1 # increment > >>> y = x # alias > >>> x, y > (6, 6) Or, still Pythonic but simpler: >>> x = 5 >>> y = x = x + 1 >>> x, y (6, 6)