[issue15775] Add StopParser() to expat
New submission from Nemeskey Dávid: The C expat library provides XML_StopParser() method that allows the parsing to be stopped from the handler functions. It would be nice to have this option in Python as well, maybe by adding StopParser() method to the XMLParser class. -- components: XML messages: 168980 nosy: nemeskeyd priority: normal severity: normal status: open title: Add StopParser() to expat type: enhancement ___ Python tracker <http://bugs.python.org/issue15775> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15775] Add StopParser() to expat
Nemeskey Dávid added the comment: OK, then this issue has a "bug" part, too: it is not mentioned in the documentation that exceptions from the handler methods propagate through the Parse() method. I guess the parser can be then stopped in this way too, but it is a dirty method as opposed to calling StopParser(). To answer your question, there are several situations where StopParser() could come in handy. For instance, the XML file might contain records (such as the output of a search engine), from which we only need the first n. Another example would be that reading through the file we realize halfway that e.g. it does not contain the information we need, contains wrong information, etc. so we want to skip the rest of it. Since the file might be huge and since XML parsing can in now way be considered fast, being able to stop the parsing in a clear way would spare the superfluous and possible lengthy computation. -- ___ Python tracker <http://bugs.python.org/issue15775> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15775] Add StopParser() to expat
Nemeskey Dávid added the comment: loewis: I don't think it would be difficult to fix, so theoretically I'd be in. However, I don't really have the time to work on this right now. -- ___ Python tracker <http://bugs.python.org/issue15775> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue15775] Add StopParser() to expat
Nemeskey Dávid added the comment: Amaury: see my previous comment. There are two problems with the method you proposed: 1. It is not mentioned in the documentation that exceptions are propagated through parse(). 2. Exceptions usually mean that an error has happened, and is not the preferred way for flow control (at least this is the policy in other languages e.g. Java, I don't know about Python). -- ___ Python tracker <http://bugs.python.org/issue15775> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
