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Package pyxb :: Package utils :: Module saxutils
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Module saxutils

source code

This module contains support for processing XML using a SAX parser.

In particular, it provides a base content handler class that maintains namespace context and element state in a stack; and a base element state class which records the location of the element in the stream. These classes are extended for specific parsing needs (e.g., pyxb.binding.saxer).

Classes [hide private]
  TracingSAXHandler
A SAX handler class which prints each method invocation.
  _NoopSAXHandler
A SAX handler class which doesn't do anything.
  SAXElementState
State corresponding to processing a given element with the SAX model.
  BaseSAXHandler
A SAX handler class that maintains a stack of enclosing elements and manages namespace declarations.
  _EntityResolver
Dummy used to prevent the SAX parser from crashing when it sees processing instructions that we don't care about.
  Handler
A SAX handler class that maintains a stack of enclosing elements and manages namespace declarations.
Functions [hide private]
 
SetCreateParserModules(create_parser_modules)
Provide list of modules to be used when creating parsers.		 source code
 
make_parser(**kw)
Extend xml.sax.make_parser to configure the parser the way we need it:		 source code
Variables [hide private]
  _log = logging.getLogger(__name__)
  _CreateParserModules = []
  xml_file = sys.argv [1]
  xmls = open(xml_file).read()
  dt1 = time.time()
  dt2 = time.time()
  dom = xml.dom.minidom.parseString(xmls)
  dt3 = time.time()
  snt1 = time.time()
  snt2 = time.time()
  snt3 = time.time()
  sbt1 = time.time()
  saxer = make_parser(content_handler= BaseSAXHandler())
  sbt2 = time.time()
  sbt3 = time.time()
  pdt1 = time.time()
  sdomer = make_parser(content_handler_constructor= saxdom._DOMS...
  h = sdomer.getContentHandler()
  pdt2 = time.time()
  pdt3 = time.time()
  lst1 = time.time()
  lst2 = time.time()
  lsh = Handler()
  lst3 = time.time()
  ldt1 = time.time()
  tree = lxml.etree.fromstring(xmls)
  ldt2 = time.time()
  ldh = xml.dom.pulldom.SAX2DOM()
  ldt3 = time.time()
  __package__ = 'pyxb.utils'
Function Details [hide private]

SetCreateParserModules(create_parser_modules)

source code 

Provide list of modules to be used when creating parsers.

xml.sax.make_parser() takes as a parameter an optional list of modules which allow customization of the parser to be used. Certain parsers have better support for Unicode than others.

As an example, providing ["drv_libxml2"] causes the libxml2 parser to be used.

The default behavior if this function is not called, or if it is called with an empty list or None, is to provide no specific modules, which will result in the system default parser (probably expat).

Parameters:
  • create_parser_modules - an iterable list of names of modules that provide a create_parser function. Pass None to reset to the system default.

make_parser(**kw)

source code 

Extend xml.sax.make_parser to configure the parser the way we need it:

  • feature_namespaces is set to True so we process xmlns directives properly
  • feature_namespace_prefixes is set to False so we don't get prefixes encoded into our names (probably redundant with the above but still...)

All keywords not documented here (and fallback_namespace, which is) are passed to the content_handler_constructor if that must be invoked.

Parameters:
  • content_handler (xml.sax.handler.ContentHandler) - The content handler instance for the parser to use. If not provided, an instance of content_handler_constructor is created and used.
  • content_handler_constructor - A callable which produces an appropriate instance of (a subclass of) BaseSAXHandler. The default is BaseSAXHandler.
  • fallback_namespace (pyxb.namespace.Namespace) - The namespace to use for lookups of unqualified names in absent namespaces; see pyxb.namespace.ExpandedName. This keyword is not used by this function, but is passed to the content_handler_constructor.

Variables Details [hide private]

sdomer

Value:
make_parser(content_handler_constructor= saxdom._DOMSAXHandler)

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