"""Simple API for XML (SAX) implementation for Python. This module provides an implementation of the SAX 2 interface; information about the Java version of the interface can be found at http://www.megginson.com/SAX/. The Python version of the interface is documented at <...>. This package contains the following modules: handler -- Base classes and constants which define the SAX 2 API for the 'client-side' of SAX for Python. saxutils -- Implementation of the convenience classes commonly used to work with SAX. xmlreader -- Base classes and constants which define the SAX 2 API for the parsers used with SAX for Python. expatreader -- Driver that allows use of the Expat parser with SAX. """ from .xmlreader import InputSource from .handler import ContentHandler, ErrorHandler from ._exceptions import SAXException, SAXNotRecognizedException, \ SAXParseException, SAXNotSupportedException, \ SAXReaderNotAvailable def parse(source, handler, errorHandler=ErrorHandler()): parser = make_parser() parser.setContentHandler(handler) parser.setErrorHandler(errorHandler) parser.parse(source) def parseString(string, handler, errorHandler=ErrorHandler()): import io if errorHandler is None: errorHandler = ErrorHandler() parser = make_parser() parser.setContentHandler(handler) parser.setErrorHandler(errorHandler) inpsrc = InputSource() if isinstance(string, str): inpsrc.setCharacterStream(io.StringIO(string)) else: inpsrc.setByteStream(io.BytesIO(string)) parser.parse(inpsrc) # this is the parser list used by the make_parser function if no # alternatives are given as parameters to the function default_parser_list = ["xml.sax.expatreader"] # tell modulefinder that importing sax potentially imports expatreader _false = 0 if _false: import xml.sax.expatreader import os, sys if not sys.flags.ignore_environment and "PY_SAX_PARSER" in os.environ: default_parser_list = os.environ["PY_SAX_PARSER"].split(",") del os, sys def make_parser(parser_list=()): """Creates and returns a SAX parser. Creates the first parser it is able to instantiate of the ones given in the iterable created by chaining parser_list and default_parser_list. The iterables must contain the names of Python modules containing both a SAX parser and a create_parser function.""" for parser_name in list(parser_list) + default_parser_list: try: return _create_parser(parser_name) except ImportError: import sys if parser_name in sys.modules: # The parser module was found, but importing it # failed unexpectedly, pass this exception through raise except SAXReaderNotAvailable: # The parser module detected that it won't work properly, # so try the next one pass raise SAXReaderNotAvailable("No parsers found", None) # --- Internal utility methods used by make_parser def _create_parser(parser_name): drv_module = __import__(parser_name,{},{},['create_parser']) return drv_module.create_parser()