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Python Library Reference

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8.11xml.sax.saxutils -- SAX Utilities

New in version 2.0.

The modulexml.sax.saxutils contains a number of classes andfunctions that are commonly useful when creating SAX applications,either in direct use, or as base classes.

escape(

data[, entities])

Escape "&", "<", and ">" in a string of data.

You can escape other strings of data by passing a dictionary as the optionalentities parameter. The keys and values must all be strings; each key will be replaced with its corresponding value.

unescape(

data[, entities])

Unescape "&amp;", "&lt;", and "&gt;" in a string of data.

You can unescape other strings of data by passing a dictionary as the optionalentities parameter. The keys and values must all be strings; each key will be replaced with its corresponding value.

New in version 2.3.

quoteattr(

data[, entities])

Similar toescape(), but also preparesdata to be used as an attribute value. The return value is a quoted version ofdata with any additional required replacements.quoteattr() will select a quote character based on the content ofdata, attempting to avoid encoding any quote characters in the string. If both single- and double-quote characters are already indata, the double-quote characters will be encoded anddata will be wrapped in double-quotes. The resulting string can be used directly as an attribute value:

>>> print "<element attr=%s>" % quoteattr("ab ' cd \" ef")<element attr="ab ' cd &quot; ef">

This function is useful when generating attribute values for HTML or any SGML using the reference concrete syntax.New in version 2.2.

class XMLGenerator(

[out[, encoding]])

This class implements theContentHandler interface by writing SAX events back into an XML document. In other words, using anXMLGenerator as the content handler will reproduce the original document being parsed.out should be a file-like object which will default tosys.stdout.encoding is the encoding of the output stream which defaults to'iso-8859-1'.

class XMLFilterBase(

base)

This class is designed to sit between anXMLReader and the client application's event handlers. By default, it does nothing but pass requests up to the reader and events on to the handlers unmodified, but subclasses can override specific methods to modify the event stream or the configuration requests as they pass through.

prepare_input_source(

source[, base])

This function takes an input source and an optional base URL and returns a fully resolvedInputSource object ready for reading. The input source can be given as a string, a file-like object, or anInputSource object; parsers will use this function to implement the polymorphicsource argument to theirparse() method.

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Python Library Reference

Previous:8.10.4 ErrorHandler ObjectsUp:8. Structured Markup ProcessingNext:8.12 xml.sax.xmlreader

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Release 2.5.2, documentation updated on 21st February, 2008.