![]() tFeature(_namespaces, 0)įor a complete detail on SAX API documentation, please refer to standard Python SAX APIs. Xmlstring − This is the name of the XML string to read from.Ĭlass MovieHandler( ): There is one more method to create a SAX parser and to parse the specified XML string. Xmlfile − This is the name of the XML file to read from.Ĭontenthandler − This must be a ContentHandler object.Įrrorhandler − If specified, errorhandler must be a SAX ErrorHandler object. Parser_list − The optional argument consisting of a list of parsers to use which must all implement the make_parser method.įollowing method creates a SAX parser and uses it to parse a document. The parser object created will be of the first parser type the system finds. Here are other important methods to understand before proceeding − The make_parser Methodįollowing method creates a new parser object and returns it. Here, tag is the element tag, and attributes is an Attributes object. If the parser is not in namespace mode, the methods startElement(tag, attributes) and endElement(tag) are called otherwise, the corresponding methods startElementNS and endElementNS are called. The ContentHandler is called at the start and end of each element. The method characters(text) is passed character data of the XML file via the parameter text. The methods startDocument and endDocument are called at the start and the end of the XML file. ![]() Its owning parser calls ContentHandler methods as it parses the XML file. A ContentHandler object provides methods to handle various parsing events. Your ContentHandler handles the particular tags and attributes of your flavor(s) of XML. Parsing XML with SAX generally requires you to create your own ContentHandler by subclassing. ![]() SAX is a standard interface for event-driven XML parsing. Since these two different APIs literally complement each other, there is no reason why you cannot use them both for large projects.įor all our XML code examples, let's use a simple XML file movies.xml as an input − SAX is read-only, while DOM allows changes to the XML file. On the other hand, using DOM exclusively can really kill your resources, especially if used on a lot of small files. SAX obviously cannot process information as fast as DOM can when working with large files. This is useful when your documents are large or you have memory limitations, it parses the file as it reads it from disk and the entire file is never stored in memory.ĭocument Object Model (DOM) API − This is a World Wide Web Consortium recommendation wherein the entire file is read into memory and stored in a hierarchical (tree-based) form to represent all the features of an XML document. Simple API for XML (SAX) − Here, you register callbacks for events of interest and then let the parser proceed through the document. The two most basic and broadly used APIs to XML data are the SAX and DOM interfaces. The Python standard library provides a minimal but useful set of interfaces to work with XML. XML is extremely useful for keeping track of small to medium amounts of data without requiring a SQL-based backbone. This is recommended by the World Wide Web Consortium and available as an open standard. The Extensible Markup Language (XML) is a markup language much like HTML or SGML. XML is a portable, open source language that allows programmers to develop applications that can be read by other applications, regardless of operating system and/or developmental language.
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