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abc.rst.txt	11805	0644	editdlrm
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ast.rst.txt	10159	0644	editdlrm
asynchat.rst.txt	8528	0644	editdlrm
asyncio-dev.rst.txt	13398	0644	editdlrm
asyncio-eventloop.rst.txt	33701	0644	editdlrm
asyncio-eventloops.rst.txt	7660	0644	editdlrm
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asyncio.rst.txt	2272	0644	editdlrm
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atexit.rst.txt	3669	0644	editdlrm
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code.rst.txt	7817	0644	editdlrm
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collections.abc.rst.txt	12861	0644	editdlrm
collections.rst.txt	46063	0644	editdlrm
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crypt.rst.txt	5122	0644	editdlrm
crypto.rst.txt	411	0644	editdlrm
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debug.rst.txt	471	0644	editdlrm
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development.rst.txt	704	0644	editdlrm
difflib.rst.txt	29861	0644	editdlrm
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faulthandler.rst.txt	6136	0644	editdlrm
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fileinput.rst.txt	8051	0644	editdlrm
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fnmatch.rst.txt	3103	0644	editdlrm
formatter.rst.txt	13242	0644	editdlrm
fpectl.rst.txt	4180	0644	editdlrm
fractions.rst.txt	6364	0644	editdlrm
frameworks.rst.txt	391	0644	editdlrm
ftplib.rst.txt	17552	0644	editdlrm
functional.rst.txt	365	0644	editdlrm
functions.rst.txt	71621	0644	editdlrm
functools.rst.txt	18503	0644	editdlrm
gc.rst.txt	9694	0644	editdlrm
getopt.rst.txt	6557	0644	editdlrm
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grp.rst.txt	2417	0644	editdlrm
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hashlib.rst.txt	26523	0644	editdlrm
heapq.rst.txt	13402	0644	editdlrm
hmac.rst.txt	4020	0644	editdlrm
html.entities.rst.txt	1319	0644	editdlrm
html.parser.rst.txt	11275	0644	editdlrm
html.rst.txt	1304	0644	editdlrm
http.client.rst.txt	18870	0644	editdlrm
http.cookiejar.rst.txt	27832	0644	editdlrm
http.cookies.rst.txt	8645	0644	editdlrm
http.rst.txt	7096	0644	editdlrm
http.server.rst.txt	17639	0644	editdlrm
i18n.rst.txt	408	0644	editdlrm
idle.rst.txt	25834	0644	editdlrm
imaplib.rst.txt	20367	0644	editdlrm
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itertools.rst.txt	38459	0644	editdlrm
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keyword.rst.txt	617	0644	editdlrm
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linecache.rst.txt	2408	0644	editdlrm
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logging.config.rst.txt	33886	0644	editdlrm
logging.handlers.rst.txt	42497	0644	editdlrm
logging.rst.txt	60479	0644	editdlrm
lzma.rst.txt	17361	0644	editdlrm
macpath.rst.txt	707	0644	editdlrm
mailbox.rst.txt	63055	0644	editdlrm
mailcap.rst.txt	3691	0644	editdlrm
markup.rst.txt	679	0644	editdlrm
marshal.rst.txt	4855	0644	editdlrm
math.rst.txt	14375	0644	editdlrm
mimetypes.rst.txt	9839	0644	editdlrm
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mm.rst.txt	431	0644	editdlrm
mmap.rst.txt	11232	0644	editdlrm
modulefinder.rst.txt	3240	0644	editdlrm
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msilib.rst.txt	18612	0644	editdlrm
msvcrt.rst.txt	4392	0644	editdlrm
multiprocessing.rst.txt	104494	0644	editdlrm
netdata.rst.txt	339	0644	editdlrm
netrc.rst.txt	3007	0644	editdlrm
nis.rst.txt	1993	0644	editdlrm
nntplib.rst.txt	21821	0644	editdlrm
numbers.rst.txt	8089	0644	editdlrm
numeric.rst.txt	696	0644	editdlrm
operator.rst.txt	18989	0644	editdlrm
optparse.rst.txt	76996	0644	editdlrm
os.path.rst.txt	16419	0644	editdlrm
os.rst.txt	137534	0644	editdlrm
ossaudiodev.rst.txt	17845	0644	editdlrm
othergui.rst.txt	2822	0644	editdlrm
parser.rst.txt	15148	0644	editdlrm
pathlib.rst.txt	30045	0644	editdlrm
pdb.rst.txt	19454	0644	editdlrm
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pickle.rst.txt	37440	0644	editdlrm
pickletools.rst.txt	3729	0644	editdlrm
pipes.rst.txt	2557	0644	editdlrm
pkgutil.rst.txt	8730	0644	editdlrm
platform.rst.txt	9624	0644	editdlrm
plistlib.rst.txt	7398	0644	editdlrm
poplib.rst.txt	8197	0644	editdlrm
posix.rst.txt	3694	0644	editdlrm
pprint.rst.txt	14274	0644	editdlrm
profile.rst.txt	27969	0644	editdlrm
pty.rst.txt	3123	0644	editdlrm
pwd.rst.txt	2739	0644	editdlrm
pyclbr.rst.txt	3297	0644	editdlrm
pydoc.rst.txt	4688	0644	editdlrm
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python.rst.txt	475	0644	editdlrm
py_compile.rst.txt	3851	0644	editdlrm
queue.rst.txt	7268	0644	editdlrm
quopri.rst.txt	2571	0644	editdlrm
random.rst.txt	18503	0644	editdlrm
re.rst.txt	64936	0644	editdlrm
readline.rst.txt	11943	0644	editdlrm
reprlib.rst.txt	5162	0644	editdlrm
resource.rst.txt	12291	0644	editdlrm
rlcompleter.rst.txt	2294	0644	editdlrm
runpy.rst.txt	8285	0644	editdlrm
sched.rst.txt	4842	0644	editdlrm
secrets.rst.txt	5930	0644	editdlrm
select.rst.txt	28175	0644	editdlrm
selectors.rst.txt	8925	0644	editdlrm
shelve.rst.txt	8390	0644	editdlrm
shlex.rst.txt	16441	0644	editdlrm
shutil.rst.txt	26014	0644	editdlrm
signal.rst.txt	17218	0644	editdlrm
site.rst.txt	9628	0644	editdlrm
smtpd.rst.txt	10806	0644	editdlrm
smtplib.rst.txt	23439	0644	editdlrm
sndhdr.rst.txt	1994	0644	editdlrm
socket.rst.txt	68202	0644	editdlrm
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sqlite3.rst.txt	39215	0644	editdlrm
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stdtypes.rst.txt	179240	0644	editdlrm
string.rst.txt	35374	0644	editdlrm
stringprep.rst.txt	4279	0644	editdlrm
struct.rst.txt	19581	0644	editdlrm
subprocess.rst.txt	45793	0644	editdlrm
sunau.rst.txt	7390	0644	editdlrm
superseded.rst.txt	258	0644	editdlrm
symbol.rst.txt	975	0644	editdlrm
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sys.rst.txt	58273	0644	editdlrm
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tabnanny.rst.txt	2007	0644	editdlrm
tarfile.rst.txt	31749	0644	editdlrm
telnetlib.rst.txt	7899	0644	editdlrm
tempfile.rst.txt	13857	0644	editdlrm
termios.rst.txt	3751	0644	editdlrm
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xml.rst.txt	6071	0644	editdlrm
xml.sax.handler.rst.txt	15399	0644	editdlrm
xml.sax.reader.rst.txt	12133	0644	editdlrm
xml.sax.rst.txt	7159	0644	editdlrm
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__future__.rst.txt	5245	0644	editdlrm
__main__.rst.txt	904	0644	editdlrm

:mod:`xml.sax.xmlreader` --- Interface for XML parsers ====================================================== .. module:: xml.sax.xmlreader :synopsis: Interface which SAX-compliant XML parsers must implement. .. moduleauthor:: Lars Marius Garshol .. sectionauthor:: Martin v. Löwis **Source code:** :source:`Lib/xml/sax/xmlreader.py` -------------- SAX parsers implement the :class:`XMLReader` interface. They are implemented in a Python module, which must provide a function :func:`create_parser`. This function is invoked by :func:`xml.sax.make_parser` with no arguments to create a new parser object. .. class:: XMLReader() Base class which can be inherited by SAX parsers. .. class:: IncrementalParser() In some cases, it is desirable not to parse an input source at once, but to feed chunks of the document as they get available. Note that the reader will normally not read the entire file, but read it in chunks as well; still :meth:`parse` won't return until the entire document is processed. So these interfaces should be used if the blocking behaviour of :meth:`parse` is not desirable. When the parser is instantiated it is ready to begin accepting data from the feed method immediately. After parsing has been finished with a call to close the reset method must be called to make the parser ready to accept new data, either from feed or using the parse method. Note that these methods must *not* be called during parsing, that is, after parse has been called and before it returns. By default, the class also implements the parse method of the XMLReader interface using the feed, close and reset methods of the IncrementalParser interface as a convenience to SAX 2.0 driver writers. .. class:: Locator() Interface for associating a SAX event with a document location. A locator object will return valid results only during calls to DocumentHandler methods; at any other time, the results are unpredictable. If information is not available, methods may return ``None``. .. class:: InputSource(system_id=None) Encapsulation of the information needed by the :class:`XMLReader` to read entities. This class may include information about the public identifier, system identifier, byte stream (possibly with character encoding information) and/or the character stream of an entity. Applications will create objects of this class for use in the :meth:`XMLReader.parse` method and for returning from EntityResolver.resolveEntity. An :class:`InputSource` belongs to the application, the :class:`XMLReader` is not allowed to modify :class:`InputSource` objects passed to it from the application, although it may make copies and modify those. .. class:: AttributesImpl(attrs) This is an implementation of the :class:`Attributes` interface (see section :ref:`attributes-objects`). This is a dictionary-like object which represents the element attributes in a :meth:`startElement` call. In addition to the most useful dictionary operations, it supports a number of other methods as described by the interface. Objects of this class should be instantiated by readers; *attrs* must be a dictionary-like object containing a mapping from attribute names to attribute values. .. class:: AttributesNSImpl(attrs, qnames) Namespace-aware variant of :class:`AttributesImpl`, which will be passed to :meth:`startElementNS`. It is derived from :class:`AttributesImpl`, but understands attribute names as two-tuples of *namespaceURI* and *localname*. In addition, it provides a number of methods expecting qualified names as they appear in the original document. This class implements the :class:`AttributesNS` interface (see section :ref:`attributes-ns-objects`). .. _xmlreader-objects: XMLReader Objects ----------------- The :class:`XMLReader` interface supports the following methods: .. method:: XMLReader.parse(source) Process an input source, producing SAX events. The *source* object can be a system identifier (a string identifying the input source -- typically a file name or a URL), a file-like object, or an :class:`InputSource` object. When :meth:`parse` returns, the input is completely processed, and the parser object can be discarded or reset. .. versionchanged:: 3.5 Added support of character streams. .. method:: XMLReader.getContentHandler() Return the current :class:`~xml.sax.handler.ContentHandler`. .. method:: XMLReader.setContentHandler(handler) Set the current :class:`~xml.sax.handler.ContentHandler`. If no :class:`~xml.sax.handler.ContentHandler` is set, content events will be discarded. .. method:: XMLReader.getDTDHandler() Return the current :class:`~xml.sax.handler.DTDHandler`. .. method:: XMLReader.setDTDHandler(handler) Set the current :class:`~xml.sax.handler.DTDHandler`. If no :class:`~xml.sax.handler.DTDHandler` is set, DTD events will be discarded. .. method:: XMLReader.getEntityResolver() Return the current :class:`~xml.sax.handler.EntityResolver`. .. method:: XMLReader.setEntityResolver(handler) Set the current :class:`~xml.sax.handler.EntityResolver`. If no :class:`~xml.sax.handler.EntityResolver` is set, attempts to resolve an external entity will result in opening the system identifier for the entity, and fail if it is not available. .. method:: XMLReader.getErrorHandler() Return the current :class:`~xml.sax.handler.ErrorHandler`. .. method:: XMLReader.setErrorHandler(handler) Set the current error handler. If no :class:`~xml.sax.handler.ErrorHandler` is set, errors will be raised as exceptions, and warnings will be printed. .. method:: XMLReader.setLocale(locale) Allow an application to set the locale for errors and warnings. SAX parsers are not required to provide localization for errors and warnings; if they cannot support the requested locale, however, they must raise a SAX exception. Applications may request a locale change in the middle of a parse. .. method:: XMLReader.getFeature(featurename) Return the current setting for feature *featurename*. If the feature is not recognized, :exc:`SAXNotRecognizedException` is raised. The well-known featurenames are listed in the module :mod:`xml.sax.handler`. .. method:: XMLReader.setFeature(featurename, value) Set the *featurename* to *value*. If the feature is not recognized, :exc:`SAXNotRecognizedException` is raised. If the feature or its setting is not supported by the parser, *SAXNotSupportedException* is raised. .. method:: XMLReader.getProperty(propertyname) Return the current setting for property *propertyname*. If the property is not recognized, a :exc:`SAXNotRecognizedException` is raised. The well-known propertynames are listed in the module :mod:`xml.sax.handler`. .. method:: XMLReader.setProperty(propertyname, value) Set the *propertyname* to *value*. If the property is not recognized, :exc:`SAXNotRecognizedException` is raised. If the property or its setting is not supported by the parser, *SAXNotSupportedException* is raised. .. _incremental-parser-objects: IncrementalParser Objects ------------------------- Instances of :class:`IncrementalParser` offer the following additional methods: .. method:: IncrementalParser.feed(data) Process a chunk of *data*. .. method:: IncrementalParser.close() Assume the end of the document. That will check well-formedness conditions that can be checked only at the end, invoke handlers, and may clean up resources allocated during parsing. .. method:: IncrementalParser.reset() This method is called after close has been called to reset the parser so that it is ready to parse new documents. The results of calling parse or feed after close without calling reset are undefined. .. _locator-objects: Locator Objects --------------- Instances of :class:`Locator` provide these methods: .. method:: Locator.getColumnNumber() Return the column number where the current event begins. .. method:: Locator.getLineNumber() Return the line number where the current event begins. .. method:: Locator.getPublicId() Return the public identifier for the current event. .. method:: Locator.getSystemId() Return the system identifier for the current event. .. _input-source-objects: InputSource Objects ------------------- .. method:: InputSource.setPublicId(id) Sets the public identifier of this :class:`InputSource`. .. method:: InputSource.getPublicId() Returns the public identifier of this :class:`InputSource`. .. method:: InputSource.setSystemId(id) Sets the system identifier of this :class:`InputSource`. .. method:: InputSource.getSystemId() Returns the system identifier of this :class:`InputSource`. .. method:: InputSource.setEncoding(encoding) Sets the character encoding of this :class:`InputSource`. The encoding must be a string acceptable for an XML encoding declaration (see section 4.3.3 of the XML recommendation). The encoding attribute of the :class:`InputSource` is ignored if the :class:`InputSource` also contains a character stream. .. method:: InputSource.getEncoding() Get the character encoding of this InputSource. .. method:: InputSource.setByteStream(bytefile) Set the byte stream (a :term:`binary file`) for this input source. The SAX parser will ignore this if there is also a character stream specified, but it will use a byte stream in preference to opening a URI connection itself. If the application knows the character encoding of the byte stream, it should set it with the setEncoding method. .. method:: InputSource.getByteStream() Get the byte stream for this input source. The getEncoding method will return the character encoding for this byte stream, or ``None`` if unknown. .. method:: InputSource.setCharacterStream(charfile) Set the character stream (a :term:`text file`) for this input source. If there is a character stream specified, the SAX parser will ignore any byte stream and will not attempt to open a URI connection to the system identifier. .. method:: InputSource.getCharacterStream() Get the character stream for this input source. .. _attributes-objects: The :class:`Attributes` Interface --------------------------------- :class:`Attributes` objects implement a portion of the :term:`mapping protocol `, including the methods :meth:`~collections.abc.Mapping.copy`, :meth:`~collections.abc.Mapping.get`, :meth:`~object.__contains__`, :meth:`~collections.abc.Mapping.items`, :meth:`~collections.abc.Mapping.keys`, and :meth:`~collections.abc.Mapping.values`. The following methods are also provided: .. method:: Attributes.getLength() Return the number of attributes. .. method:: Attributes.getNames() Return the names of the attributes. .. method:: Attributes.getType(name) Returns the type of the attribute *name*, which is normally ``'CDATA'``. .. method:: Attributes.getValue(name) Return the value of attribute *name*. .. getValueByQName, getNameByQName, getQNameByName, getQNames available .. here already, but documented only for derived class. .. _attributes-ns-objects: The :class:`AttributesNS` Interface ----------------------------------- This interface is a subtype of the :class:`Attributes` interface (see section :ref:`attributes-objects`). All methods supported by that interface are also available on :class:`AttributesNS` objects. The following methods are also available: .. method:: AttributesNS.getValueByQName(name) Return the value for a qualified name. .. method:: AttributesNS.getNameByQName(name) Return the ``(namespace, localname)`` pair for a qualified *name*. .. method:: AttributesNS.getQNameByName(name) Return the qualified name for a ``(namespace, localname)`` pair. .. method:: AttributesNS.getQNames() Return the qualified names of all attributes.