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To process large XML files asynchronously in Python, the SAX (Simple API for XML) parser is a great choice. SAX is an event-driven, memory-efficient parser that reads XML sequentially, making it suitable for large files.
Example: Asynchronous SAX Parsing
Below is an example of using xml.sax with threading to parse an XML file asynchronously:
import xml.saximport threadingfrom queue import Queueclass AsyncSAXHandler(xml.sax.ContentHandler):def __init__(self, queue):super().__init__()self.queue = queuedef startElement(self, name, attrs):self.queue.put(f"Start Element: {name}")def endElement(self, name):self.queue.put(f"End Element: {name}")def characters(self, content):if content.strip():self.queue.put(f"Characters: {content.strip()}")def parse_xml(file_path, queue):parser = xml.sax.make_parser()handler = AsyncSAXHandler(queue)parser.setContentHandler(handler)with open(file_path, 'r') as file:parser.parse(file)def process_queue(queue):while True:message = queue.get()if message == "STOP":breakprint(message)# Main threadqueue = Queue()thread = threading.Thread(target=parse_xml, args=("example.xml", queue))thread.start()process_queue(queue)queue.put("STOP")thread.join()Cóipeáilte!✕Cóipeáil Parsing XML with SAX APIs in Python - Online Tutorials Library
31 Ean 2020 · SAX is a standard interface for event-driven XML parsing. Parsing XML with SAX generally requires you to create your own ContentHandler by subclassing xml.sax.ContentHandler.
Python XML with SAX - Event-Driven Parsing - ZetCode
15 Feabh 2025 · Python XML with SAX tutorial shows how to use the SAX API for event-driven XML parsing in Python.
python - How to use xml sax parser to read and write a large ...
19 Feabh 2017 · How to use xml sax parser to read and write a large xml? I'm trying to remove all the project1 nodes (along with their child elements) from the below sample xml document (original …
GitHub - luminati-io/parsing-xml-with-python: Parse XML …
8 Aib 2025 · Learn how to parse XML in Python using libraries like ElementTree, lxml, and SAX to enhance your data processing projects. Before diving into how …
Parsing XML with SAX - Python in a Nutshell, 2nd Edition [Book]
In most cases, the best way to extract information from an XML document is to parse the document with an event-driven parser compliant with SAX, the Simple API for XML.
Mastering Incremental XML Parsing with Python's SAX
The ElementTree module is the modern, Pythonic standard for XML. Its iterparse function is a fantastic, simple way to achieve incremental, event-driven parsing. It's easier to use than SAX because it …
A Roadmap to XML Parsers in Python
25 MFómh 2023 · In short, SAX is cheap in terms of space and time but more difficult to use than DOM in most cases. It works well for parsing very large …
Parsing with SAX and DOM
Python provides the Basic interface to the SAX parser, an exception handling system, a set of base classes for creating SAX handlers, and a low-level interface to the SAX system for building your own …
20.9. xml.sax — Support for SAX2 parsers - Python 3.4 ...
The xml.sax package provides a number of modules which implement the Simple API for XML (SAX) interface for Python. The package itself provides the SAX exceptions and the convenience functions …
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