1title: Release Notes for v2.3 2 3Python-Markdown 2.3 Release Notes 4================================= 5 6We are pleased to release Python-Markdown 2.3 which adds one new extension, 7removes a few old (obsolete) extensions, and now runs on both Python 2 and 8Python 3 without running the 2to3 conversion tool. See the list of changes 9below for details. 10 11Python-Markdown supports Python versions 2.6, 2.7, 3.1, 3.2, and 3.3. 12 13Backwards-incompatible Changes 14------------------------------ 15 16* Support has been dropped for Python 2.5. No guarantees are made that the 17 library will work in any version of Python lower than 2.6. As all supported 18 Python versions include the ElementTree library, Python-Markdown will no 19 longer try to import a third-party installation of ElementTree. 20 21* All classes are now "new-style" classes. In other words, all classes subclass 22 from 'object'. While this is not likely to affect most users, extension 23 authors may need to make a few minor adjustments to their code. 24 25* "safe_mode" has been further restricted. Markdown formatted links must be of a 26 known white-listed scheme when in "safe_mode" or the URL is discarded. The 27 white-listed schemes are: 'HTTP', 'HTTPS', 'FTP', 'FTPS', 'MAILTO', and 28 'news'. Schemeless URLs are also permitted, but are checked in other ways - as 29 they have been for some time. 30 31* The ids assigned to footnotes now contain a dash (`-`) rather than a colon 32 (`:`) when `output_format` it set to `"html5"` or `"xhtml5"`. If you are 33 making reference to those ids in your JavaScript or CSS and using the HTML5 34 output, you will need to update your code accordingly. No changes are 35 necessary if you are outputting XHTML (the default) or HTML4. 36 37* The `force_linenos` configuration setting of the CodeHilite extension has been 38 marked as **Pending Deprecation** and a new setting `linenums` has been added 39 to replace it. See documentation for the [CodeHilite Extension] for an 40 explanation of the new `linenums` setting. The new setting will honor the old 41 `force_linenos` if it is set, but it will raise a `PendingDeprecationWarning` 42 and will likely be removed in a future version of Python-Markdown. 43 44[CodeHilite Extension]: ../extensions/code_hilite.md 45 46* The "RSS" extension has been removed and no longer ships with Python-Markdown. 47 If you would like to continue using the extension (not recommended), it is 48 archived on [GitHub](https://gist.github.com/waylan/4773365). 49 50* The "HTML Tidy" Extension has been removed and no longer ships with 51 Python-Markdown. If you would like to continue using the extension (not 52 recommended), it is archived on 53 [GitHub](https://gist.github.com/waylan/5152650). Note that the underlying 54 library, uTidylib, is not Python 3 compatible. Instead, it is recommended that 55 the newer [PyTidyLib] (version 0.2.2+ for Python 3 comparability - install 56 from GitHub not PyPI) be used. As the API for that library is rather simple, 57 it is recommended that the output of Markdown be wrapped in a call to 58 PyTidyLib rather than using an extension (for example: 59 `tidylib.tidy_fragment(markdown.markdown(source), options={...})`). 60 61[PyTidyLib]: http://countergram.github.io/pytidylib/ 62 63What's New in Python-Markdown 2.3 64--------------------------------- 65 66* The entire code base now universally runs in Python 2 and Python 3 without any 67 need for running the 2to3 conversion tool. This not only simplifies testing, 68 but by using Unicode_literals, results in more consistent behavior across 69 Python versions. Additionally, the relative imports (made possible in Python 2 70 via absolute_import) allows the entire library to more easily be embedded in a 71 sub-directory of another project. The various files within the library will 72 still import each other properly even though 'markdown' may not be in Python's 73 root namespace. 74 75* The [Admonition Extension] has been added, which implements [rST-style][rST] 76 admonitions in the Markdown syntax. However, be warned that this extension is 77 experimental and the syntax and behavior is still subject to change. Please 78 try it out and report bugs and/or improvements. 79 80[Admonition Extension]: ../extensions/admonition.md 81[rST]: http://docutils.sourceforge.net/docs/ref/rst/directives.html#specific-admonitions 82 83* Various bug fixes have been made. See the [commit 84 log](https://github.com/Python-Markdown/markdown/commits/master) for a 85 complete history of the changes. 86