ElementTree.write() has a new option doctype that writes out a
doctype string before the serialisation, in the same way as tostring().
GH220: xmlfile allows switching output methods at an element level.
Patch by Burak Arslan.
LP1595781, GH240: added a PyCapsule Python API and C-level API for
passing externally generated libxml2 documents into lxml.
GH244: error log entries have a new property path with an XPath
expression (if known, None otherwise) that points to the tree element
responsible for the error. Patch by Bob Kline.
The namespace prefix mapping that can be used in ElementPath now injects
a default namespace when passing a None prefix.
Bugs fixed
GH238: Character escapes were not hex-encoded in the xmlfile serialiser.
Patch by matejcik.
GH229: fix for externally created XML documents. Patch by Theodore Dubois.
LP1665241, GH228: Form data handling in lxml.html no longer strips the
option values specified in form attributes but only the text values.
Patch by Ashish Kulkarni.
LP1551797: revert previous fix for XSLT error logging as it breaks
multi-threaded XSLT processing.
LP1673355, GH233: fromstring() html5parser failed to parse byte strings.
Other changes
The previously undocumented docstring option in ElementTree.write()
produces a deprecation warning and will eventually be removed.
3.7.4
==================
Bugs fixed
LP1551797: revert previous fix for XSLT error logging as it breaks
multi-threaded XSLT processing.
LP1673355, GH233: fromstring() html5parser failed to parse byte strings.
3.7.3
==================
Bugs fixed
GH218 was ineffective in Python 3.
GH222: lxml.html.submit_form() failed in Python 3.
Patch by Jakub Wilk.
3.7.2
==================
GH220: xmlfile allows switching output methods at an element level.
Patch by Burak Arslan.
Bugs fixed
Work around installation problems in recent Python 2.7 versions
due to FTP download failures.
GH219: xmlfile.element() was not properly quoting attribute values.
Patch by Burak Arslan.
GH218: xmlfile.element() was not properly escaping text content of
script/style tags. Patch by Burak Arslan.
3.7.1
==================
No source changes, issued only to solve problems with the
binary packages released for 3.7.0.
3.7.0
==================
Features added
GH217: XMLSyntaxError now behaves more like its SyntaxError
baseclass. Patch by Philipp A.
GH216: HTMLParser() now supports the same collect_ids parameter
as XMLParser(). Patch by Burak Arslan.
GH210: Allow specifying a serialisation method in xmlfile.write().
Patch by Burak Arslan.
GH203: New option default_doctype in HTMLParser that allows
disabling the automatic doctype creation. Patch by Shadab Zafar.
GH201: Calling the method .set('attrname') without value argument
(or None) on HTML elements creates an attribute without value that
serialises like <div attrname></div>. Patch by Daniel Holth.
GH197: Ignore form input fields in form_values() when they are
marked as disabled in HTML. Patch by Kristian Klemon.
Bugs fixed
GH206: File name and line number were missing from XSLT error messages.
Patch by Marcus Brinkmann.
Other changes
Log entries no longer allow anything but plain string objects as message text
and file name.
zlib is included in the list of statically built libraries.
3.6.4
==================
GH204, LP1614693: build fix for MacOS-X.
3.6.3
==================
LP1614603: change linker flags to build multi-linux wheels
3.6.2
==================
LP1614603: release without source changes to provide cleanly built Linux wheels
3.6.1
==================
Features added
GH180: Separate option inline_style for Cleaner that only removes style
attributes instead of all styles. Patch by Christian Pedersen.
GH196: Windows build support for Python 3.5. Contribution by Maximilian Hils.
Bugs fixed
GH199: Exclude file fields from FormElement.form_values (as browsers do).
Patch by Tomas Divis.
GH198, LP1568167: Try to provide base URL from Resolver.resolve_string().
Patch by Michael van Tellingen.
GH191: More accurate float serialisation in objectify.FloatElement.
Patch by Holger Joukl.
LP1551797: Repair XSLT error logging. Patch by Marcus Brinkmann.
3.6.0
==================
Features added
GH187: Now supports (only) version 5.x and later of PyPy.
Patch by Armin Rigo.
GH181: Direct support for .rnc files in RelaxNG() if rnc2rng
is installed. Patch by Dirkjan Ochtman.
Bugs fixed
GH189: Static builds honour FTP proxy configurations when downloading
the external libs. Patch by Youhei Sakurai.
GH186: Soupparser failed to process entities in Python 3.x.
Patch by Duncan Morris.
GH185: Rare encoding related TypeError on import was fixed.
Patch by Petr Demin.
3.5.0
==================
Bugs fixed
Unicode string results failed XPath queries in PyPy.
LP1497051: HTML target parser failed to terminate on exceptions
and continued parsing instead.
Deprecated API usage in doctestcompare.
3.5.0b1
====================
Features added
cleanup_namespaces() accepts a new argument keep_ns_prefixes
that does not remove definitions of the provided prefix-namespace
mapping from the tree.
cleanup_namespaces() accepts a new argument top_nsmap that
moves definitions of the provided prefix-namespace mapping to the
top of the tree.
LP1490451: Element objects gained a cssselect() method as
known from lxml.html. Patch by Simon Sapin.
API functions and methods behave and look more like Python functions,
which allows introspection on them etc. One side effect to be aware of
is that the functions now bind as methods when assigned to a class
variable. A quick fix is to wrap them in staticmethod() (as for
normal Python functions).
ISO-Schematron support gained an option error_finder that allows
passing a filter function for picking validation errors from reports.
LP1243600: Elements in lxml.html gained a classes property
that provides a set-like interface to the class attribute.
Original patch by masklinn.
LP1341964: The soupparser now handles DOCTYPE declarations, comments
and processing instructions outside of the root element.
Patch by Olli Pottonen.
LP1421512: The docinfo of a tree was made editable to allow
setting and removing the public ID and system ID of the DOCTYPE.
Patch by Olli Pottonen.
LP1442427: More work-arounds for quirks and bugs in pypy and pypy3.
lxml.html.soupparser now uses BeautifulSoup version 4 instead
of version 3 if available.
Bugs fixed
Memory errors that occur during tree adaptations (e.g. moving subtrees
to foreign documents) could leave the tree in a crash prone state.
Calling process_children() in an XSLT extension element without
an output_parent argument failed with a TypeError.
Fix by Jens Tröger.
GH162: Image data in HTML data URLs is considered safe and
no longer removed by lxml.html.clean JavaScript cleaner.
GH166: Static build could link libraries in wrong order.
GH172: Rely a bit more on libxml2 for encoding detection rather than
rolling our own in some cases. Patch by Olli Pottonen.
GH159: Validity checks for names and string content were tightened
to detect the use of illegal characters early. Patch by Olli Pottonen.
LP1421921: Comments/PIs before the DOCTYPE declaration were not
serialised. Patch by Olli Pottonen.
LP659367: Some HTML DOCTYPE declarations were not serialised.
Patch by Olli Pottonen.
LP1238503: lxml.doctestcompare is now consistent with stdlib's doctest
in how it uses + and - to refer to unexpected and missing output.
Empty prefixes are explicitly rejected when a namespace mapping is used
with ElementPath to avoid hiding bugs in user code.
Several problems with PyPy were fixed by switching to Cython 0.23.
3.4.4
==================
Bugs fixed
An ElementTree compatibility test added in lxml 3.4.3 that failed in
Python 3.4+ was removed again.
3.4.3
==================
Bugs fixed
Expression cache in ElementPath was ignored. Fix by Changaco.
LP1426868: Passing a default namespace and a prefixed namespace mapping
as nsmap into xmlfile.element() raised a TypeError.
LP1421927: DOCTYPE system URLs were incorrectly quoted when containing
double quotes. Patch by Olli Pottonen.
LP1419354: meta-redirect URLs were incorrectly processed by
iterlinks() if preceded by whitespace.
3.4.2
==================
Bugs fixed
LP1415907: Crash when creating an XMLSchema from a non-root element
of an XML document.
LP1369362: HTML cleaning failed when hitting processing instructions
with pseudo-attributes.
CDATA() wrapped content was rejected for tail text.
CDATA sections were not serialised as tail text of the top-level element.
3.4.1
==================
Features added
New htmlfile HTML generator to accompany the incremental xmlfile
serialisation API. Patch by Burak Arslan.
Bugs fixed
lxml.sax.ElementTreeContentHandler did not initialise its superclass.
3.4.0
==================
Features added
xmlfile(buffered=False) disables output buffering and flushes the
content after each API operation (starting/ending element blocks or writes).
A new method xf.flush() can alternatively be used to explicitly flush
the output.
lxml.html.document_fromstring has a new option ensure_head_body=True
which will add an empty head and/or body element to the result document if
missing.
lxml.html.iterlinks now returns links inside meta refresh tags.
New XMLParser option collect_ids=False to disable ID hash table
creation. This can substantially speed up parsing of documents with many
different IDs that are not used.
The parser uses per-document hash tables for XML IDs. This reduces the
load of the global parser dict and speeds up parsing for documents with
many different IDs.
ElementTree.getelementpath(element) returns a structural ElementPath
expression for the given element, which can be used for lookups later.
xmlfile() accepts a new argument close=True to close file(-like)
objects after writing to them. Before, xmlfile() only closed the file
if it had opened it internally.
Allow "bytearray" type for ASCII text input.
Bugs fixed
Other changes
LP400588: decoding errors have become hard errors even in recovery mode.
Previously, they could lead to an internal tree representation in a mixed
encoding state, which lead to very late errors or even silently incorrect
behaviour during tree traversal or serialisation.
Requires Python 2.6, 2.7, 3.2 or later. No longer supports
Python 2.4, 2.5 and 3.1, use lxml 3.3.x for those.
Requires libxml2 2.7.0 or later and libxslt 1.1.23 or later,
use lxml 3.3.x with older versions.
3.3.6
==================
Bugs fixed
Prevent tree cycle creation when adding Elements as siblings.
LP1361948: crash when deallocating Element siblings without parent.
LP1354652: crash when traversing internally loaded documents in XSLT
extension functions.
3.3.5
==================
Bugs fixed
HTML cleaning could fail to strip javascript links that mix control
characters into the link scheme.
3.3.4
==================
Features added
Source line numbers above 65535 are available on Elements when
using libxml2 2.9 or later.
Bugs fixed
lxml.html.fragment_fromstring() failed for bytes input in Py3.
Other changes
3.3.3
==================
Bugs fixed
LP1287118: Crash when using Element subtypes with __slots__.
Other changes
The internal classes _LogEntry and _Attrib can no longer be
subclassed from Python code.
3.3.2
==================
Bugs fixed
The properties resolvers and version, as well as the methods
set_element_class_lookup() and makeelement(), were lost from
iterparse objects in 3.3.0.
LP1222132: instances of XMLSchema, Schematron and RelaxNG
did not clear their local error_log before running a validation.
LP1238500: lxml.doctestcompare mixed up "expected" and "actual" in
attribute values.
Some file I/O tests were failing in MS-Windows due to non-portable temp
file usage. Initial patch by Gabi Davar.
LP910014: duplicate IDs in a document were not reported by DTD validation.
LP1185332: tostring(method="html") did not use HTML serialisation
semantics for trailing tail text. Initial patch by Sylvain Viollon.
LP1281139: .attrib value of Comments lost its mutation methods
in 3.3.0. Even though it is empty and immutable, it should still
provide the same interface as that returned for Elements.
3.3.1
==================
Features added
Bugs fixed
LP1014290: HTML documents parsed with parser.feed() failed to find
elements during tag iteration.
LP1273709: Building in PyPy failed due to missing support for
PyUnicode_Compare() and PyByteArray_*() in PyPy's C-API.
LP1274413: Compilation in MSVC failed due to missing "stdint.h" standard
header file.
LP1274118: iterparse() failed to parse BOM prefixed files.
Other changes
3.3.0
==================
Features added
Bugs fixed
The heuristic that distinguishes file paths from URLs was tightened
to produce less false negatives.
Other changes
3.3.0beta5
=======================
Features added
The PEP 393 unicode parsing support gained a fallback for wchar strings
which might still be somewhat common on Windows systems.
Bugs fixed
Several error handling problems were fixed throughout the code base that
could previously lead to exceptions being silently swallowed or not
properly reported.
The C-API function appendChild() is now deprecated as it does not
propagate exceptions (its return type is void). The new function
appendChildToElement() was added as a safe replacement.
Passing a string into fromstringlist() raises an exception instead of
parsing the string character by character.
Other changes
Document cleanup code was simplified using the new GC features in
Cython 0.20.
3.3.0beta4
=======================
Features added
Bugs fixed
The (empty) value returned by the attrib property of Entity and Comment
objects was mutable.
Element class lookup wasn't available for the new pull parsers or when using
a custom parser target.
Setting Element attributes on instantiation with both the attrib argument
and keyword arguments could modify the mapping passed as attrib.
LP1266171: DTDs instantiated from internal/external subsets (i.e. through
the docinfo property) lost their attribute declarations.
Other changes
Built with Cython 0.20pre (gitrev 012ae82eb) to prepare support for
Python 3.4.
3.3.0beta3
=======================
Features added
Unicode string parsing was optimised for Python 3.3 (PEP 393).
Bugs fixed
HTML parsing of Unicode strings could misdecode the input on some platforms.
Crash in xmlfile() when closing open elements out of order in an error case.
Other changes
3.3.0beta2
=======================
Features added
iterparse() supports the recover option.
Bugs fixed
Crash in iterparse() for HTML parsing.
Crash in target parsing with attributes.
Other changes
The safety check in the read-only tree implementation (e.g. used by
PythonElementClassLookup) raises a more appropriate ReferenceError
for illegal access after tree disposal instead of an AssertionError.
This should only impact test code that specifically checks the original
behaviour.
3.3.0beta1
=======================
Features added
New option handle_failures in make_links_absolute() and
resolve_base_href() (lxml.html) that enables ignoring or
discarding links that fail to parse as URLs.
New parser classes XMLPullParser and HTMLPullParser for
incremental parsing, as implemented for ElementTree in Python 3.4.
iterparse() enables recovery mode by default for HTML parsing
(html=True).
Bugs fixed
LP1255132: crash when trying to run validation over non-Element (e.g.
comment or PI).
Error messages in the log and in exception messages that originated
from libxml2 could accidentally be picked up from preceding warnings
instead of the actual error.
The ElementMaker in lxml.objectify did not accept a dict as
argument for adding attributes to the element it's building. This
works as in lxml.builder now.
LP1228881: repr(XSLTAccessControl) failed in Python 3.
Raise ValueError when trying to append an Element to itself or
to one of its own descendants, instead of running into an infinite
loop.
LP1206077: htmldiff discarded whitespace from the output.
Compressed plain-text serialisation to file-like objects was broken.
lxml.html.formfill: Fix textarea form filling.
The textarea used to be cleared before the new content was set,
which removed the name attribute.
Other changes
Some basic API classes use freelists internally for faster
instantiation. This can speed up some iterparse() scenarios,
for example.
iterparse() was rewritten to use the new *PullParser
classes internally instead of being a parser itself.
3.2.5
==================
Features added
Bugs fixed
Crash in xmlfile() when closing open elements out of order in an error case.
Crash in target parsing with attributes.
LP1255132: crash when trying to run validation over non-Element (e.g.
comment or PI).
Other changes
3.2.4
==================
Features added
Bugs fixed
Memory leak when creating an XPath evaluator in a thread.
LP1228881: repr(XSLTAccessControl) failed in Python 3.
Raise ValueError when trying to append an Element to itself or
to one of its own descendants.
LP1206077: htmldiff discarded whitespace from the output.
Compressed plain-text serialisation to file-like objects was broken.
Other changes
3.2.3
==================
Bugs fixed
Fix support for Python 2.4 which was lost in 3.2.2.
3.2.2
==================
Features added
Bugs fixed
LP1185701: spurious XMLSyntaxError after finishing iterparse().
Crash in lxml.objectify during xsi annotation.
Other changes
Return values of user provided element class lookup methods are now
validated against the type of the XML node they represent to prevent
API class mismatches.
3.2.1
==================
Features added
The methods apply_templates() and process_children() of XSLT
extension elements have gained two new boolean options elements_only
and remove_blank_text that discard either all strings or whitespace-only
strings from the result list.
Bugs fixed
When moving Elements to another tree, the namespace cleanup mechanism
no longer drops namespace prefixes from attributes for which it finds
a default namespace declaration, to prevent them from appearing as
unnamespaced attributes after serialisation.
Returning non-type objects from a custom class lookup method could lead
to a crash.
Instantiating and using subtypes of Comments and ProcessingInstructions
crashed.
Other changes
3.2.0
==================
Features added
Bugs fixed
LP690319: Leading whitespace could change the behaviour of the string
parsing functions in lxml.html.
LP599318: The string parsing functions in lxml.html are more robust
in the face of uncommon HTML content like framesets or missing body tags.
Patch by Stefan Seelmann.
LP712941: I/O errors while trying to access files with paths that contain
non-ASCII characters could raise UnicodeDecodeError instead of properly
reporting the IOError.
LP673205: Parsing from in-memory strings disabled network access in the
default parser and made subsequent attempts to parse from a URL fail.
LP971754: lxml.html.clean appends 'nofollow' to 'rel' attributes instead
of overwriting the current value.
LP715687: lxml.html.clean no longer discards scripts that are explicitly
allowed by the user provided whitelist. Patch by Christine Koppelt.
Other changes
3.1.2
==================
Features added
Bugs fixed
LP1136509: Passing attributes through the namespace-unaware API of
the sax bridge (i.e. the handler.startElement() method) failed
with a TypeError. Patch by Mike Bayer.
LP1123074: Fix serialisation error in XSLT output when converting
the result tree to a Unicode string.
GH105: Replace illegal usage of xmlBufLength() in libxml2 2.9.0
by properly exported API function xmlBufUse().
Other changes
3.1.1
==================
Features added
Bugs fixed
LP1160386: Write access to lxml.html.FormElement.fields raised
an AttributeError in Py3.
Illegal memory access during cleanup in incremental xmlfile writer.
Other changes
The externally useless class lxml.etree._BaseParser was removed
from the module dict.
3.1.0
==================
Features added
GH89: lxml.html.clean allows overriding the set of attributes that it
considers 'safe'. Patch by Francis Devereux.
Bugs fixed
LP1104370: copy.copy(el.attrib) raised an exception. It now returns
a copy of the attributes as a plain Python dict.
GH95: When used with namespace prefixes, the el.find*() methods
always used the first namespace mapping that was provided for each
path expression instead of using the one that was actually passed
in for the current run.
LP1092521, GH91: Fix undefined C symbol in Python runtimes compiled
without threading support. Patch by Ulrich Seidl.
Other changes
3.1beta1
=====================
Features added
New build-time option --with-unicode-strings for Python 2 that
makes the API always return Unicode strings for names and text
instead of byte strings for plain ASCII content.
New incremental XML file writing API etree.xmlfile().
E factory in lxml.objectify is callable to simplify the creation of
tags with non-identifier names without having to resort to getattr().
Bugs fixed
When starting from a non-namespaced element in lxml.objectify, searching
for a child without explicitly specifying a namespace incorrectly found
namespaced elements with the requested local name, instead of restricting
the search to non-namespaced children.
GH85: Deprecation warnings were fixed for Python 3.x.
GH33: lxml.html.fromstring() failed to accept bytes input in Py3.
LP1080792: Static build of libxml2 2.9.0 failed due to missing file.
Other changes
The externally useless class _ObjectifyElementMakerCaller was
removed from the module API of lxml.objectify.
LP1075622: lxml.builder is faster for adding text to elements with
many children. Patch by Anders Hammarquist.
3.0.2
==================
Features added
Bugs fixed
Fix crash during interpreter shutdown by switching to Cython 0.17.3 for building.
Other changes
3.0.1
==================
Features added
Bugs fixed
LP1065924: Element proxies could disappear during garbage collection
in PyPy without proper cleanup.
GH71: Failure to work with libxml2 2.6.x.
LP1065139: static MacOS-X build failed in Py3.
Other changes
3.0
================
Features added
Bugs fixed
End-of-file handling was incorrect in iterparse() when reading from
a low-level C file stream and failed in libxml2 2.9.0 due to its
improved consistency checks.
Other changes
The build no longer uses Cython by default unless the generated C files
are missing. To use Cython, pass the option "--with-cython". To ignore
the fatal build error when Cython is required but not available (e.g. to
run special setup.py commands that do not actually run a build), pass
"--without-cython".
3.0beta1
=====================
Features added
Python level access to (optional) libxml2 memory debugging features
to simplify debugging of memory leaks etc.
Bugs fixed
Fix a memory leak in XPath by switching to Cython 0.17.1.
Some tests were adapted to work with PyPy.
Other changes
The code was adapted to work with the upcoming libxml2 2.9.0 release.
3.0alpha2
======================
Features added
The .iter() method of elements now accepts tag arguments like
"{*}name" to search for elements with a given local name in any
namespace. With this addition, all combinations of wildcards now work
as expected:
"{ns}name", "{}name", "{*}name", "{ns}*", "{}*"
and "{*}*". Note that "name" is equivalent to "{}name",
but "*" is "{*}*".
The same change applies to the .getiterator(), .itersiblings(),
.iterancestors(), .iterdescendants(), .iterchildren()
and .itertext() methods;the strip_attributes(),
strip_elements() and strip_tags() functions as well as the
iterparse() class. Patch by Simon Sapin.
C14N allows specifying the inclusive prefixes to be promoted
to top-level during exclusive serialisation.
Bugs fixed
Passing long Unicode strings into the feed() parser interface
failed to read the entire string.
Other changes
3.0alpha1
======================
Features added
Initial support for building in PyPy (through cpyext).
DTD objects gained an API that allows read access to their
declarations.
xpathgrep.py gained support for parsing line-by-line (e.g.
from grep output) and for surrounding the output with a new root
tag.
E-factory in lxml.builder accepts subtypes of known data
types (such as string subtypes) when building elements around them.
Tree iteration and iterparse() with a selective tag
argument supports passing a set of tags. Tree nodes will be
returned by the iterators if they match any of the tags.
Bugs fixed
The .find*() methods in lxml.objectify no longer use XPath
internally, which makes them faster in many cases (especially when
short circuiting after a single or couple of elements) and fixes
some behavioural differences compared to lxml.etree. Note that
this means that they no longer support arbitrary XPath expressions
but only the subset that the ElementPath language supports.
The previous implementation was also redundant with the normal
XPath support, which can be used as a replacement.
el.find('*') could accidentally return a comment or processing
instruction that happened to be in the wrong spot. (Same for the
other .find*() methods.)
The error logging is less intrusive and avoids a global setup where
possible.
Fixed undefined names in html5lib parser.
xpathgrep.py did not work in Python 3.
Element.attrib.update() did not accept an attrib of
another Element as parameter.
For subtypes of ElementBase that make the .text or .tail
properties immutable (as in objectify, for example), inserting text
when creating Elements through the E-Factory feature of the class
constructor would fail with an exception, stating that the text
cannot be modified.
Other changes
The code base was overhauled to properly use 'const' where the API
of libxml2 and libxslt requests it. This also has an impact on the
public C-API of lxml itself, as defined in etreepublic.pxd, as
well as the provided declarations in the lxml/includes/ directory.
Code that uses these declarations may have to be adapted. On the
plus side, this fixes several C compiler warnings, also for user
code, thus making it easier to spot real problems again.
The functionality of "lxml.cssselect" was moved into a separate PyPI
package called "cssselect". To continue using it, you must install
that package separately. The "lxml.cssselect" module is still
available and provides the same interface, provided the "cssselect"
package can be imported at runtime.
Element attributes passed in as an attrib dict or as keyword
arguments are now sorted by (namespaced) name before being created
to make their order predictable for serialisation and iteration.
Note that adding or deleting attributes afterwards does not take
that order into account, i.e. setting a new attribute appends it
after the existing ones.
Several classes that are for internal use only were removed
from the lxml.etree module dict:
_InputDocument, _ResolverRegistry, _ResolverContext, _BaseContext, _ExsltRegExp, _IterparseContext, _TempStore, _ExceptionContext, __ContentOnlyElement, _AttribIterator, _NamespaceRegistry, _ClassNamespaceRegistry, _FunctionNamespaceRegistry, _XPathFunctionNamespaceRegistry, _ParserDictionaryContext, _FileReaderContext, _ParserContext, _PythonSaxParserTarget, _TargetParserContext, _ReadOnlyProxy, _ReadOnlyPIProxy, _ReadOnlyEntityProxy, _ReadOnlyElementProxy, _OpaqueNodeWrapper, _OpaqueDocumentWrapper, _ModifyContentOnlyProxy, _ModifyContentOnlyPIProxy, _ModifyContentOnlyEntityProxy, _AppendOnlyElementProxy, _SaxParserContext, _FilelikeWriter, _ParserSchemaValidationContext, _XPathContext, _XSLTResolverContext, _XSLTContext, _XSLTQuotedStringParam
Several internal classes can no longer be inherited from:
_InputDocument, _ResolverRegistry, _ExsltRegExp, _ElementUnicodeResult, _IterparseContext, _TempStore, _AttribIterator, _ClassNamespaceRegistry, _XPathFunctionNamespaceRegistry, _ParserDictionaryContext, _FileReaderContext, _PythonSaxParserTarget, _TargetParserContext, _ReadOnlyPIProxy, _ReadOnlyEntityProxy, _OpaqueDocumentWrapper, _ModifyContentOnlyPIProxy, _ModifyContentOnlyEntityProxy, _AppendOnlyElementProxy, _FilelikeWriter, _ParserSchemaValidationContext, _XPathContext, _XSLTResolverContext, _XSLTContext, _XSLTQuotedStringParam, _XSLTResultTree, _XSLTProcessingInstruction
2.3.6
==================
Features added
Bugs fixed
Passing long Unicode strings into the feed() parser interface
failed to read the entire string.
Other changes
2.3.5
==================
Features added
Bugs fixed
Crash when merging text nodes in element.remove().
Crash in sax/target parser when reporting empty doctype.
Other changes
2.3.4
==================
Features added
Bugs fixed
Crash when building an nsmap (Element property) with empty
namespace URIs.
Crash due to race condition when errors (or user messages) occur
during threaded XSLT processing.
XSLT stylesheet compilation could ignore compilation errors.
Other changes
2.3.3
==================
Features added
lxml.html.tostring() gained new serialisation options
with_tail and doctype.
Bugs fixed
Fixed a crash when using iterparse() for HTML parsing and
requesting start events.
Fixed parsing of more selectors in cssselect. Whitespace before
pseudo-elements and pseudo-classes is significant as it is a
descendant combinator.
"E :pseudo" should parse the same as "E *:pseudo", not "E:pseudo".
Patch by Simon Sapin.
lxml.html.diff no longer raises an exception when hitting
'img' tags without 'src' attribute.
Other changes
2.3.2
==================
Features added
lxml.objectify.deannotate() has a new boolean option
cleanup_namespaces to remove the objectify namespace
declarations (and generally clean up the namespace declarations)
after removing the type annotations.
lxml.objectify gained its own SubElement() function as a
copy of etree.SubElement to avoid an otherwise redundant import
of lxml.etree on the user side.
Bugs fixed
Fixed the "descendant" bug in cssselect a second time (after a first
fix in lxml 2.3.1). The previous change resulted in a serious
performance regression for the XPath based evaluation of the
translated expression. Note that this breaks the usage of some of
the generated XPath expressions as XSLT location paths that
previously worked in 2.3.1.
Fixed parsing of some selectors in cssselect. Whitespace after combinators
">", "+" and "~" is now correctly ignored. Previously it was parsed as
a descendant combinator. For example, "div> .foo" was parsed the same as
"div>* .foo" instead of "div>.foo". Patch by Simon Sapin.
Other changes
2.3.1
==================
Features added
New option kill_tags in lxml.html.clean to remove specific
tags and their content (i.e. their whole subtree).
pi.get() and pi.attrib on processing instructions to parse
pseudo-attributes from the text content of processing instructions.
lxml.get_include() returns a list of include paths that can be
used to compile external C code against lxml.etree. This is
specifically required for statically linked lxml builds when code
needs to compile against the exact same header file versions as lxml
itself.
Resolver.resolve_file() takes an additional option
close_file that configures if the file(-like) object will be
closed after reading or not. By default, the file will be closed,
as the user is not expected to keep a reference to it.
Bugs fixed
HTML cleaning didn't remove 'data:' links.
The html5lib parser integration now uses the 'official'
implementation in html5lib itself, which makes it work with newer
releases of the library.
In lxml.sax, endElementNS() could incorrectly reject a plain
tag name when the corresponding start event inferred the same plain
tag name to be in the default namespace.
When an open file-like object is passed into parse() or
iterparse(), the parser will no longer close it after use. This
reverts a change in lxml 2.3 where all files would be closed. It is
the users responsibility to properly close the file(-like) object,
also in error cases.
Assertion error in lxml.html.cleaner when discarding top-level elements.
In lxml.cssselect, use the xpath 'A//B' (short for
'A/descendant-or-self::node()/B') instead of 'A/descendant::B' for
the css descendant selector ('A B'). This makes a few edge cases
like "div *:last-child" consistent with the selector behavior in
WebKit and Firefox, and makes more css expressions valid location
paths (for use in xsl:template match).
In lxml.html, non-selected <option> tags no longer show up in the
collected form values.
Adding/removing <option> values to/from a multiple select form
field properly selects them and unselects them.
Other changes
Static builds can specify the download directory with the
--download-dir option.
2.3
================
Features added
When looking for children, lxml.objectify takes '{}tag' as
meaning an empty namespace, as opposed to the parent namespace.
Bugs fixed
When finished reading from a file-like object, the parser
immediately calls its .close() method.
When finished parsing, iterparse() immediately closes the input
file.
Work-around for libxml2 bug that can leave the HTML parser in a
non-functional state after parsing a severely broken document (fixed
in libxml2 2.7.8).
marque tag in HTML cleanup code is correctly named marquee.
Other changes
Some public functions in the Cython-level C-API have more explicit
return types.
2.3beta1
=====================
Features added
Bugs fixed
Crash in newer libxml2 versions when moving elements between
documents that had attributes on replaced XInclude nodes.
XMLID() function was missing the optional parser and
base_url parameters.
Searching for wildcard tags in iterparse() was broken in Py3.
lxml.html.open_in_browser() didn't work in Python 3 due to the
use of os.tempnam. It now takes an optional 'encoding' parameter.
Other changes
2.3alpha2
======================
Features added
Bugs fixed
Crash in XSLT when generating text-only result documents with a
stylesheet created in a different thread.
Other changes
repr() of Element objects shows the hex ID with leading 0x
(following ElementTree 1.3).
2.3alpha1
======================
Features added
Keyword argument namespaces in lxml.cssselect.CSSSelector()
to pass a prefix-to-namespace mapping for the selector.
New function lxml.etree.register_namespace(prefix, uri) that
globally registers a namespace prefix for a namespace that newly
created Elements in that namespace will use automatically. Follows
ElementTree 1.3.
Support 'unicode' string name as encoding parameter in
tostring(), following ElementTree 1.3.
Support 'c14n' serialisation method in ElementTree.write() and
tostring(), following ElementTree 1.3.
The ElementPath expression syntax (el.find*()) was extended to
match the upcoming ElementTree 1.3 that will ship in the standard
library of Python 3.2/2.7. This includes extended support for
predicates as well as namespace prefixes (as known from XPath).
During regular XPath evaluation, various ESXLT functions are
available within their namespace when using libxslt 1.1.26 or later.
Support passing a readily configured logger instance into
PyErrorLog, instead of a logger name.
On serialisation, the new doctype parameter can be used to
override the DOCTYPE (internal subset) of the document.
New parameter output_parent to XSLTExtension.apply_templates()
to append the resulting content directly to an output element.
XSLTExtension.process_children() to process the content of the
XSLT extension element itself.
ISO-Schematron support based on the de-facto Schematron reference
'skeleton implementation'.
XSLT objects now take XPath object as __call__ stylesheet
parameters.
Enable path caching in ElementPath (el.find*()) to avoid parsing
overhead.
Setting the value of a namespaced attribute always uses a prefixed
namespace instead of the default namespace even if both declare the
same namespace URI. This avoids serialisation problems when an
attribute from a default namespace is set on an element from a
different namespace.
XSLT extension elements: support for XSLT context nodes other than
elements: document root, comments, processing instructions.
Support for strings (in addition to Elements) in node-sets returned
by extension functions.
Forms that lack an action attribute default to the base URL of
the document on submit.
XPath attribute result strings have an attrname property.
Namespace URIs get validated against RFC 3986 at the API level
(required by the XML namespace specification).
Target parsers show their target object in the .target property
(compatible with ElementTree).
Bugs fixed
API is hardened against invalid proxy instances to prevent crashes
due to incorrectly instantiated Element instances.
Prevent crash when instantiating CommentBase and friends.
Export ElementTree compatible XML parser class as
XMLTreeBuilder, as it is called in ET 1.2.
ObjectifiedDataElements in lxml.objectify were not hashable. They
now use the hash value of the underlying Python value (string,
number, etc.) to which they compare equal.
Parsing broken fragments in lxml.html could fail if the fragment
contained an orphaned closing '</div>' tag.
Using XSLT extension elements around the root of the output document
crashed.
lxml.cssselect did not distinguish between x[attr="val"] and
x [attr="val"] (with a space). The latter now matches the
attribute independent of the element.
Rewriting multiple links inside of HTML text content could end up
replacing unrelated content as replacements could impact the
reported position of subsequent matches. Modifications are now
simplified by letting the iterlinks() generator in lxml.html
return links in reversed order if they appear inside the same text
node. Thus, replacements and link-internal modifications no longer
change the position of links reported afterwards.
The .value attribute of textarea elements in lxml.html did
not represent the complete raw value (including child tags etc.). It
now serialises the complete content on read and replaces the
complete content by a string on write.
Target parser didn't call .close() on the target object if
parsing failed. Now it is guaranteed that .close() will be
called after parsing, regardless of the outcome.
Other changes
Official support for Python 3.1.2 and later.
Static MS Windows builds can now download their dependencies
themselves.
Element.attrib no longer uses a cyclic reference back to its
Element object. It therefore no longer requires the garbage
collector to clean up.
Static builds include libiconv, in addition to libxml2 and libxslt.
2.2.8
==================
Bugs fixed
Crash in newer libxml2 versions when moving elements between
documents that had attributes on replaced XInclude nodes.
Import fix for urljoin in Python 3.1+.
2.2.7
==================
Bugs fixed
Crash in XSLT when generating text-only result documents with a
stylesheet created in a different thread.
2.2.6
==================
Bugs fixed
Fixed several Python 3 regressions by building with Cython 0.11.3.
2.2.5
==================
Features added
Support for running XSLT extension elements on the input root node
(e.g. in a template matching on "/").
Bugs fixed
Crash in XPath evaluation when reading smart strings from a document
other than the original context document.
Support recent versions of html5lib by not requiring its
XHTMLParser in htmlparser.py anymore.
Manually instantiating the custom element classes in
lxml.objectify could crash.
Invalid XML text characters were not rejected by the API when they
appeared in unicode strings directly after non-ASCII characters.
lxml.html.open_http_urllib() did not work in Python 3.
The functions strip_tags() and strip_elements() in
lxml.etree did not remove all occurrences of a tag in all cases.
Crash in XSLT extension elements when the XSLT context node is not
an element.
2.2.4
==================
Bugs fixed
Static build of libxml2/libxslt was broken.
2.2.3
==================
Features added
Bugs fixed
The resolve_entities option did not work in the incremental feed
parser.
Looking up and deleting attributes without a namespace could hit a
namespaced attribute of the same name instead.
Late errors during calls to SubElement() (e.g. attribute related
ones) could leave a partially initialised element in the tree.
Modifying trees that contain parsed entity references could result
in an infinite loop.
ObjectifiedElement.setattr created an empty-string child element when the
attribute value was rejected as a non-unicode/non-ascii string
Syntax errors in lxml.cssselect could result in misleading error
messages.
Invalid syntax in CSS expressions could lead to an infinite loop in
the parser of lxml.cssselect.
CSS special character escapes were not properly handled in
lxml.cssselect.
CSS Unicode escapes were not properly decoded in lxml.cssselect.
Select options in HTML forms that had no explicit value
attribute were not handled correctly. The HTML standard dictates
that their value is defined by their text content. This is now
supported by lxml.html.
XPath raised a TypeError when finding CDATA sections. This is now
fully supported.
Calling help(lxml.objectify) didn't work at the prompt.
The ElementMaker in lxml.objectify no longer defines the default
namespaces when annotation is disabled.
Feed parser failed to honour the 'recover' option on parse errors.
Diverting the error logging to Python's logging system was broken.
Other changes
2.2.2
==================
Features added
New helper functions strip_attributes(), strip_elements(),
strip_tags() in lxml.etree to remove attributes/subtrees/tags
from a subtree.
Bugs fixed
Namespace cleanup on subtree insertions could result in missing
namespace declarations (and potentially crashes) if the element
defining a namespace was deleted and the namespace was not used by
the top element of the inserted subtree but only in deeper subtrees.
Raising an exception from a parser target callback didn't always
terminate the parser.
Only {true, false, 1, 0} are accepted as the lexical representation for
BoolElement ({True, False, T, F, t, f} not any more), restoring lxml <= 2.0
behaviour.
Other changes
2.2.1
==================
Features added
Injecting default attributes into a document during XML Schema
validation (also at parse time).
Pass huge_tree parser option to disable parser security
restrictions imposed by libxml2 2.7.
Bugs fixed
The script for statically building libxml2 and libxslt didn't work
in Py3.
XMLSchema() also passes invalid schema documents on to libxml2
for parsing (which could lead to a crash before release 2.6.24).
Other changes
2.2
================
Features added
Support for standalone flag in XML declaration through
tree.docinfo.standalone and by passing standalone=True/False
on serialisation.
Bugs fixed
Crash when parsing an XML Schema with external imports from a
filename.
2.2beta4
=====================
Features added
Support strings and instantiable Element classes as child arguments
to the constructor of custom Element classes.
GZip compression support for serialisation to files and file-like
objects.
Bugs fixed
Deep-copying an ElementTree copied neither its sibling PIs and
comments nor its internal/external DTD subsets.
Soupparser failed on broken attributes without values.
Crash in XSLT when overwriting an already defined attribute using
xsl:attribute.
Crash bug in exception handling code under Python 3. This was due
to a problem in Cython, not lxml itself.
lxml.html.FormElement._name() failed for non top-level forms.
TAG special attribute in constructor of custom Element classes
was evaluated incorrectly.
Other changes
Official support for Python 3.0.1.
Element.findtext() now returns an empty string instead of None
for Elements without text content.
2.2beta3
=====================
Features added
XSLT.strparam() class method to wrap quoted string parameters
that require escaping.
Bugs fixed
Memory leak in XPath evaluators.
Crash when parsing indented XML in one thread and merging it with
other documents parsed in another thread.
Setting the base attribute in lxml.objectify from a unicode
string failed.
Fixes following changes in Python 3.0.1.
Minor fixes for Python 3.
Other changes
The global error log (which is copied into the exception log) is now
local to a thread, which fixes some race conditions.
More robust error handling on serialisation.
2.2beta2
=====================
Bugs fixed
Potential memory leak on exception handling. This was due to a
problem in Cython, not lxml itself.
iter_links (and related link-rewriting functions) in
lxml.html would interpret CSS like url("link") incorrectly
(treating the quotation marks as part of the link).
Failing import on systems that have an io module.
2.2beta1
=====================
Features added
Allow lxml.html.diff.htmldiff to accept Element objects, not
just HTML strings.
Bugs fixed
Crash when using an XPath evaluator in multiple threads.
Fixed missing whitespace before Link:... in lxml.html.diff.
Other changes
Export lxml.html.parse.
2.2alpha1
======================
Features added
Support for XSLT result tree fragments in XPath/XSLT extension
functions.
QName objects have new properties namespace and localname.
New options for exclusive C14N and C14N without comments.
Instantiating a custom Element classes creates a new Element.
Bugs fixed
XSLT didn't inherit the parse options of the input document.
0-bytes could slip through the API when used inside of Unicode
strings.
With lxml.html.clean.autolink, links with balanced parenthesis,
that end in a parenthesis, will be linked in their entirety (typical
with Wikipedia links).
Other changes
2.1.5
==================
Bugs fixed
Potential memory leak on exception handling. This was due to a
problem in Cython, not lxml itself.
Failing import on systems that have an io module.
2.1.4
==================
Bugs fixed
Crash when using an XPath evaluator in multiple threads.
2.1.3
==================
Features added
Bugs fixed
Ref-count leaks when lxml enters a try-except statement while an
outside exception lives in sys.exc_*(). This was due to a problem in
Cython, not lxml itself.
Parser Unicode decoding errors could get swallowed by other
exceptions.
Name/import errors in some Python modules.
Internal DTD subsets that did not specify a system or public ID were
not serialised and did not appear in the docinfo property of
ElementTrees.
Fix a pre-Py3k warning when parsing from a gzip file in Py2.6.
Test suite fixes for libxml2 2.7.
Resolver.resolve_string() did not work for non-ASCII byte strings.
Resolver.resolve_file() was broken.
Overriding the parser encoding didn't work for many encodings.
Other changes
2.1.2
==================
Features added
lxml.etree now tries to find the absolute path name of files when
parsing from a file-like object. This helps custom resolvers when
resolving relative URLs, as lixbml2 can prepend them with the path
of the source document.
Bugs fixed
Memory problem when passing documents between threads.
Target parser did not honour the recover option and raised an
exception instead of calling .close() on the target.
Other changes
2.1.1
==================
Features added
Bugs fixed
Crash when parsing XSLT stylesheets in a thread and using them in
another.
Encoding problem when including text with ElementInclude under
Python 3.
Other changes
2.1
================
Features added
Smart strings can be switched off in XPath (smart_strings
keyword option).
lxml.html.rewrite_links() strips links to work around documents
with whitespace in URL attributes.
Bugs fixed
Custom resolvers were not used for XMLSchema includes/imports and
XInclude processing.
CSS selector parser dropped remaining expression after a function
with parameters.
Other changes
objectify.enableRecursiveStr() was removed, use
objectify.enable_recursive_str() instead
Speed-up when running XSLTs on documents from other threads
2.1beta3
=====================
Features added
Major overhaul of tools/xpathgrep.py script.
Pickling ElementTree objects in lxml.objectify.
Support for parsing from file-like objects that return unicode
strings.
New function etree.cleanup_namespaces(el) that removes unused
namespace declarations from a (sub)tree (experimental).
XSLT results support the buffer protocol in Python 3.
Polymorphic functions in lxml.html that accept either a tree or
a parsable string will return either a UTF-8 encoded byte string, a
unicode string or a tree, based on the type of the input.
Previously, the result was always a byte string or a tree.
Support for Python 2.6 and 3.0 beta.
File name handling now uses a heuristic to convert between byte
strings (usually filenames) and unicode strings (usually URLs).
Parsing from a plain file object frees the GIL under Python 2.x.
Running iterparse() on a plain file (or filename) frees the GIL
on reading under Python 2.x.
Conversion functions html_to_xhtml() and xhtml_to_html() in
lxml.html (experimental).
Most features in lxml.html work for XHTML namespaced tag names
(experimental).
Crash in Element class lookup classes when the init() method of
the super class is not called from Python subclasses.
A number of problems related to unicode/byte string conversion of
filenames and error messages were fixed.
Building on MacOS-X now passes the "flat_namespace" option to the C
compiler, which reportedly prevents build quirks and crashes on this
platform.
Windows build was broken.
Rare crash when serialising to a file object with certain encodings.
Other changes
Non-ASCII characters in attribute values are no longer escaped on
serialisation.
Passing non-ASCII byte strings or invalid unicode strings as .tag,
namespaces, etc. will result in a ValueError instead of an
AssertionError (just like the tag well-formedness check).
Up to several times faster attribute access (i.e. tree traversal) in
lxml.objectify.
2.1beta2
=====================
Features added
All parse functions in lxml.html take a parser keyword argument.
lxml.html has a new parser class XHTMLParser and a module
attribute xhtml_parser that provide XML parsers that are
pre-configured for the lxml.html package.
Bugs fixed
Moving a subtree from a document created in one thread into a
document of another thread could crash when the rest of the source
document is deleted while the subtree is still in use.
Passing an nsmap when creating an Element will no longer strip
redundantly defined namespace URIs. This prevented the definition
of more than one prefix for a namespace on the same Element.
Other changes
If the default namespace is redundantly defined with a prefix on the
same Element, the prefix will now be preferred for subelements and
attributes. This allows users to work around a problem in libxml2
where attributes from the default namespace could serialise without
a prefix even when they appear on an Element with a different
namespace (i.e. they would end up in the wrong namespace).
2.1beta1
=====================
Features added
Error logging in Schematron (requires libxml2 2.6.32 or later).
Parser option strip_cdata for normalising or keeping CDATA
sections. Defaults to True as before, thus replacing CDATA
sections by their text content.
CDATA() factory to wrap string content as CDATA section.
Bugs fixed
Resolving to a filename in custom resolvers didn't work.
lxml did not honour libxslt's second error state "STOPPED", which
let some XSLT errors pass silently.
Memory leak in Schematron with libxml2 >= 2.6.31.
lxml.etree accepted non well-formed namespace prefix names.
Other changes
Major cleanup in internal moveNodeToDocument() function, which
takes care of namespace cleanup when moving elements between
different namespace contexts.
New Elements created through the makeelement() method of an HTML
parser or through lxml.html now end up in a new HTML document
(doctype HTML 4.01 Transitional) instead of a generic XML document.
This mostly impacts the serialisation and the availability of a DTD
context.
2.1alpha1
======================
Features added
New event types 'comment' and 'pi' in iterparse().
XSLTAccessControl instances have a property options that
returns a dict of access configuration options.
Constant instances DENY_ALL and DENY_WRITE on
XSLTAccessControl class.
Extension elements for XSLT (experimental!)
Element.base property returns the xml:base or HTML base URL of
an Element.
docinfo.URL property is writable.
Bugs fixed
Default encoding for plain text serialisation was different from
that of XML serialisation (UTF-8 instead of ASCII).
Other changes
Minor API speed-ups.
The benchmark suite now uses tail text in the trees, which makes the
absolute numbers incomparable to previous results.
Generating the HTML documentation now requires Pygments_, which is
used to enable syntax highlighting for the doctest examples.
Most long-time deprecated functions and methods were removed:
etree.clearErrorLog(), use etree.clear_error_log()
etree.useGlobalPythonLog(), use
etree.use_global_python_log()
etree.ElementClassLookup.setFallback(), use
etree.ElementClassLookup.set_fallback()
etree.getDefaultParser(), use etree.get_default_parser()
etree.setDefaultParser(), use etree.set_default_parser()
etree.setElementClassLookup(), use
etree.set_element_class_lookup()
Note that parser.setElementClassLookup() has not been removed
yet, although parser.set_element_class_lookup() should be used
instead.
xpath_evaluator.registerNamespace(), use
xpath_evaluator.register_namespace()
xpath_evaluator.registerNamespaces(), use
xpath_evaluator.register_namespaces()
objectify.setPytypeAttributeTag, use
objectify.set_pytype_attribute_tag
objectify.setDefaultParser(), use
objectify.set_default_parser()
2.0.11
===================
Bugs fixed
Crash when using an XPath evaluator in multiple threads.
2.0.10
===================
Bugs fixed
Ref-count leaks when lxml enters a try-except statement while an
outside exception lives in sys.exc_*(). This was due to a problem in
Cython, not lxml itself.
2.0.9
==================
Bugs fixed
Memory problem when passing documents between threads.
Target parser did not honour the recover option and raised an
exception instead of calling .close() on the target.
2.0.8
==================
Features added
lxml.html.rewrite_links() strips links to work around documents
with whitespace in URL attributes.
Bugs fixed
Crash when parsing XSLT stylesheets in a thread and using them in
another.
CSS selector parser dropped remaining expression after a function
with parameters.
Other changes
2.0.7
==================
Features added
Pickling ElementTree objects in lxml.objectify.
Bugs fixed
Descending dot-separated classes in CSS selectors were not resolved
correctly.
Crash in Element class lookup classes when the init() method of
the super class is not called from Python subclasses.
Other changes
Non-ASCII characters in attribute values are no longer escaped on
serialisation.
2.0.6
==================
Features added
Bugs fixed
Incorrect evaluation of el.find("tag[child]").
Windows build was broken.
Moving a subtree from a document created in one thread into a
document of another thread could crash when the rest of the source
document is deleted while the subtree is still in use.
Rare crash when serialising to a file object with certain encodings.
Other changes
lxml should now build without problems on MacOS-X.
2.0.5
==================
Features added
Bugs fixed
Resolving to a filename in custom resolvers didn't work.
lxml did not honour libxslt's second error state "STOPPED", which
let some XSLT errors pass silently.
Coverage remained the same at 92.303% when pulling 4b4d631b6e5cc61e5b4c0d2125466b5e33112e61 on pyup-pin-lxml-3.8.0 into 49901f7dac3b52da1c5126ad151803f42e608c2f on master.
lxml is not pinned to a specific version.
I'm pinning it to the latest version 3.8.0 for now.
These links might come in handy: PyPI | Changelog | Homepage | Bugtracker
Changelog