Released February 14, 2022 (changes):

  • Dropped support for end-of-life Python 3.5.
  • Added support for Python 3.10. (#278)
  • Fixed a regression in v0.6.2 that broke parsing of nested wikilinks in file captions. For now, the parser will handle interpret wikilinks in normal links as well, even though this differs from MediaWiki. (#270)


Released September 2, 2021 (changes):

  • Added Linux AArch64 wheels. (#276)
  • Fixed C integer conversion, manifesting as parsing errors on big-endian platforms. (#277)


Released May 16, 2021 (changes):

  • Improved parsing of external links. (#232)
  • Fixed parsing of nested wikilinks.
  • Ported tests to pytest. (#237)
  • Moved mwparserfromhell package to src/ dir.
  • There was no 0.6.1 release due to a packaging error.


Released December 21, 2020 (changes):

Thanks to everyone for their patience with this release!

  • Breaking change: dropped support for end-of-life Python 2.7 and 3.4.
  • Added support for Python 3.8 and 3.9.
  • Added binary wheels for Linux and macOS.
  • Updated Wikicode.matches() to recognize underscores as being equivalent to spaces. (#216)
  • Added a default parameter to Template.get(), and implement dict-style item access for template parameters. (#252)
  • Fixed a rare parsing bug involving deeply nested style tags. (#224)
  • Fixed parsing of section headings inside templates. (#233)
  • Updated HTML tag definitions.
  • Internal refactoring and cleanup.


Released May 15, 2019 (changes):

  • Fixed an unlikely crash in the C tokenizer when interrupted while parsing a heading.


Released March 30, 2019 (changes):


Released November 1, 2018 (changes):

  • Dropped support for end-of-life Python versions 2.6, 3.2, 3.3. (#199, #204)
  • Fixed signals getting stuck inside the C tokenizer until parsing finishes, in pathological cases. (#206)
  • Fixed <wbr> not being considered a single-only tag. (#200)
  • Fixed a C tokenizer crash on Python 3.7 when compiled with assertions. (#208)
  • Cleaned up some minor documentation issues. (#207)


Released March 3, 2018 (changes):

  • Improved behavior when adding parameters to templates (via Template.add()) with poorly formatted whitespace conventions. (#185)
  • Fixed the parser getting stuck in deeply nested HTML tags with unclosed, quoted attributes. (#190)


Released June 23, 2017 (changes):

  • Added Wikicode.contains() to determine whether a Node or Wikicode object is contained within another Wikicode object.
  • Added Wikicode.get_ancestors() and Wikicode.get_parent() to find all ancestors and the direct parent of a Node, respectively.
  • Fixed a long-standing performance issue with deeply nested, invalid syntax (issue #42). The parser should be much faster on certain complex pages. The “max cycle” restriction has also been removed, so some situations where templates at the end of a page were being skipped are now resolved.
  • Made Template.remove(keep_field=True) behave more reasonably when the parameter is already empty.
  • Added the keep_template_params argument to Wikicode.strip_code(). If True, then template parameters will be preserved in the output.
  • Wikicode objects can now be pickled properly (fixed infinite recursion error on incompletely-constructed StringMixIn subclasses).
  • Fixed Wikicode.matches()’s behavior on iterables besides lists and tuples.
  • Fixed len() sometimes raising ValueError on empty node lists.
  • Fixed a rare parsing bug involving self-closing tags inside the attributes of unpaired tags.
  • Fixed release script after changes to PyPI.


Released December 30, 2016 (changes):

  • Added support for Python 3.6.
  • Fixed parsing bugs involving:
    • wikitables nested in templates;
    • wikitable error recovery when unable to recurse;
    • templates nested in template parameters before other parameters.
  • Fixed parsing file-like objects.
  • Made builds deterministic.
  • Documented caveats.


Released October 29, 2015 (changes):

  • Added Windows binaries for Python 3.5.
  • Fixed edge cases involving wikilinks inside of external links and vice versa.
  • Fixed a C tokenizer crash when a keyboard interrupt happens while parsing.


Released July 30, 2015 (changes):

  • Fixed setup script not including header files in releases.
  • Fixed Windows binary uploads.


Released July 30, 2015 (changes):

  • The process for building Windows binaries has been fixed, and these should be distributed along with new releases. Windows users can now take advantage of C speedups without having a compiler of their own.
  • Added support for Python 3.5.
  • < and > are now disallowed in wikilink titles and template names. This includes when denoting tags, but not comments.
  • Fixed the behavior of preserve_spacing in Template.add() and keep_field in Template.remove() on parameters with hidden keys.
  • Removed _ListProxy.detach(). SmartLists now use weak references and their children are garbage-collected properly.
  • Fixed parser bugs involving:
    • templates with completely blank names;
    • templates with newlines and comments.
  • Heavy refactoring and fixes to the C tokenizer, including:
    • corrected a design flaw in text handling, allowing for substantial speed improvements when parsing long strings of plain text;
    • implemented new Python 3.3 PEP 393 Unicode APIs.
  • Fixed various bugs in SmartList, including one that was causing memory issues on 64-bit builds of Python 2 on Windows.
  • Fixed some bugs in the release scripts.


Released May 23, 2015 (changes):

  • The parser now falls back on pure Python mode if C extensions cannot be built. This fixes an issue that prevented some Windows users from installing the parser.
  • Added support for parsing wikicode tables (patches by David Winegar).
  • Added a script to test for memory leaks in scripts/
  • Added a script to do releases in scripts/
  • skip_style_tags can now be passed to mwparserfromhell.parse() (previously, only Parser.parse() allowed it).
  • The recursive argument to Wikicode's filter() methods now accepts a third option, RECURSE_OTHERS, which recurses over all children except instances of forcetype (for example, code.filter_templates(code.RECURSE_OTHERS) returns all un-nested templates).
  • The parser now understands HTML tag attributes quoted with single quotes. When setting a tag attribute’s value, quotes will be added if necessary. As part of this, Attribute’s quoted attribute has been changed to quotes, and is now either a string or None.
  • Calling Template.remove() with a Parameter object that is not part of the template now raises ValueError instead of doing nothing.
  • Parameters with non-integer keys can no longer be created with showkey=False, nor have the value of this attribute be set to False later.
  • _ListProxy.destroy() has been changed to _ListProxy.detach(), and now works in a more useful way.
  • If something goes wrong while parsing, ParserError will now be raised. Previously, the parser would produce an unclear BadRoute exception or allow an incorrect node tree to be build.
  • Fixed parser bugs involving:
    • nested tags;
    • comments in template names;
    • tags inside of <nowiki> tags.
  • Added tests to ensure that parsed trees convert back to wikicode without unintentional modifications.
  • Added support for a NOWEB environment variable, which disables a unit test that makes a web call.
  • Test coverage has been improved, and some minor related bugs have been fixed.
  • Updated and fixed some documentation.


Released April 22, 2014 (changes):

  • Added support for Python 2.6 and 3.4.
  • Template.has() is now passed ignore_empty=False by default instead of True. This fixes a bug when adding parameters to templates with empty fields, and is a breaking change if you rely on the default behavior.
  • The matches argument of Wikicode's filter() methods now accepts a function (taking one argument, a Node, and returning a bool) in addition to a regex.
  • Re-added flat argument to Wikicode.get_sections(), fixed the order in which it returns sections, and made it faster.
  • Wikicode.matches() now accepts a tuple or list of strings/Wikicode objects instead of just a single string or Wikicode.
  • Given the frequency of issues with the (admittedly insufficient) tag parser, there’s a temporary skip_style_tags argument to parse() that ignores '' and ''' until these issues are corrected.
  • Fixed a parser bug involving nested wikilinks and external links.
  • C code cleanup and speed improvements.


Released September 1, 2013 (changes):

  • Added support for Python 3.2 (along with current support for 3.3 and 2.7).
  • Renamed Template.remove()’s first argument from name to param, which now accepts Parameter objects in addition to parameter name strings.


Released August 29, 2013 (changes):

  • Fixed a parser bug involving URLs nested inside other markup.
  • Fixed some typos.


Released August 24, 2013 (changes):

  • Added complete support for HTML Tags, including forms like <ref>foo</ref>, <ref name="bar"/>, and wiki-markup tags like bold ('''), italics (''), and lists (*, #, ; and :).
  • Added support for ExternalLinks ( and [ Example]).
  • Wikicode's filter() methods are now passed recursive=True by default instead of False. This is a breaking change if you rely on any filter() methods being non-recursive by default.
  • Added a matches() method to Wikicode for page/template name comparisons.
  • The obj param of Wikicode.insert_before(), insert_after(), replace(), and remove() now accepts Wikicode objects and strings representing parts of wikitext, instead of just nodes. These methods also make all possible substitutions instead of just one.
  • Renamed Template.has_param() to has() for consistency with Template’s other methods; has_param() is now an alias.
  • The C tokenizer extension now works on Python 3 in addition to Python 2.7.
  • Various bugfixes, internal changes, and cleanup.


Released June 20, 2013 (changes):

  • The parser now fully supports Python 3 in addition to Python 2.7.
  • Added a C tokenizer extension that is significantly faster than its Python equivalent. It is enabled by default (if available) and can be toggled by setting mwparserfromhell.parser.use_c to a boolean value.
  • Added a complete set of unit tests covering parsing and wikicode manipulation.
  • Renamed filter_links() to filter_wikilinks() (applies to ifilter() as well).
  • Added filter methods for Arguments, Comments, Headings, and HTMLEntities.
  • Added before param to Template.add(); renamed force_nonconformity to preserve_spacing.
  • Added include_lead param to Wikicode.get_sections().
  • Removed flat param from get_sections().
  • Removed force_no_field param from Template.remove().
  • Added support for Travis CI.
  • Added note about Windows build issue in the README.
  • The tokenizer will limit itself to a realistic recursion depth to prevent errors and unreasonably long parse times.
  • Fixed how some nodes’ attribute setters handle input.
  • Fixed multiple bugs in the tokenizer’s handling of invalid markup.
  • Fixed bugs in the implementation of SmartList and StringMixIn.
  • Fixed some broken example code in the README; other copyedits.
  • Other bugfixes and code cleanup.


Released September 21, 2012 (changes):

  • Added support for Comments (<!-- foo -->) and Wikilinks ([[foo]]).
  • Added corresponding ifilter_links() and filter_links() methods to Wikicode.
  • Fixed a bug when parsing incomplete templates.
  • Fixed strip_code() to affect the contents of headings.
  • Various copyedits in documentation and comments.


Released August 23, 2012:

  • Initial release.