Path: eternal-september.org!news.eternal-september.org!feeder3.eternal-september.org!fu-berlin.de!uni-berlin.de!not-for-mail From: ram@zedat.fu-berlin.de (Stefan Ram) Newsgroups: comp.lang.python Subject: Re: extend behaviour of assignment operator Date: 10 Jan 2024 19:40:49 GMT Organization: Stefan Ram Lines: 25 Expires: 1 Dec 2024 11:59:58 GMT Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Trace: news.uni-berlin.de +Pf7wNw/likkiD+6EA6T6wFVVlKbjly4xtrKt6iZZmAPX7 Cancel-Lock: sha1:5mbNTkq1fsL6LI0qgVzSQ83aoMI= sha256:adftsrYxZ5bpmhBcwzaSanHH1mK5DQ7DLVSUYYLXFOs= X-Copyright: (C) Copyright 2024 Stefan Ram. All rights reserved. Distribution through any means other than regular usenet channels is forbidden. It is forbidden to publish this article in the Web, to change URIs of this article into links, and to transfer the body without this notice, but quotations of parts in other Usenet posts are allowed. X-No-Archive: Yes Archive: no X-No-Archive-Readme: "X-No-Archive" is set, because this prevents some services to mirror the article in the web. But the article may be kept on a Usenet archive server with only NNTP access. X-No-Html: yes Content-Language: en-US Accept-Language: de-DE-1901, en-US, it, fr-FR Guenther Sohler writes: >i'd like to extend the behaviour of the assignment operator The following attempt is just a proof of concept, as it will not handle properly all possible code. To do something similar in a more general way, use "import ast", parse the code into an AST and then search the AST for assignements and insert code to change the name attribute after them. import re class thing: pass # all things pass code = r''' a = thing() print( a.name ) b = a print( b.name ) ''' code = \ re.sub\ ( r'((?:^|\n)(\s*)([\w_]+)\s*=.*(\n|$))', r'\1\2\3.name="\3"\n', code ) exec( code )