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authorWaylan Limberg <waylan@gmail.com>2011-10-10 21:36:22 -0400
committerWaylan Limberg <waylan@gmail.com>2011-10-10 21:36:22 -0400
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Release 2.1.0-Beta2.1.0.beta
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+Python-Markdown 2.1.0-Beta Release Notes
+========================================
+
+We are pleased to release Python-Markdown 2.1-Beta which makes many
+improvements on 2.0. In fact, we consider 2.1 to be what 2.0 should have been.
+While 2.1 consists mostly of bug fixes, bringing Python-Markdown more inline
+with other implementations, some internal improvements were made to the parser,
+a few new builtin extensions were added, and HTML5 support was added.
+
+Please be aware that Python-Markdown 2.1-Beta is *beta* software and is not
+considered production ready pending the release of 2.1-Final.
+
+Python-Markdown supports Python versions 2.4, 2.5, 2.6, 2.7, 3.1, and 3.2 out
+of the box. In fact, the same codebase installs on Python 3.1 and 3.2 with no
+extra work by the end user.
+
+Backwards-incompatible Changes
+------------------------------
+
+While Python-Markdown has received only minor internal changes since the last
+release, there are a few backward-incompatible changes to note:
+
+* Support had been dropped for Python 2.3. No guarantees are made that the
+library will work in any version of Python lower than 2.4. Additionally, while
+the library had been tested with Python 2.4, consider Python 2.4 support to be
+depreciated. It is not likely that any future versions will continue to support
+any version of Python less than 2.5. Note that Python 3.0 is not supported due
+to a bug in its 2to3 tool. If you must use Python-Markdown with Python 3.0, it
+is suggested you manually use Python 3.1's 2to3 tool to do a conversion.
+
+* Python-Markdown previously accepted positional arguments on its class and
+wrapper methods. It now expects keyword arguments. Currently, the positional
+arguments should continue to work, but the solution feels hacky and may be
+removed in a future version. All users are encouraged to use keyword arguments
+as documented in [Using Markdown as a Python Library](using_as_module.html).
+
+* Past versions of Python-Markdown provided module level Global variables which
+controlled the behavior of a few different aspects of the parser. Those global
+variables have been replaced with attributes on the Markdown class.
+Additionally, those attributes are settable as keyword arguments when
+initializing a class instance. Therefore, if you were editing the global
+variables (either by editing the source or by overriding them in your code),
+you should now set them on the class. See
+[Using Markdown as a Python Library](using_as_module.html) for the options
+available.
+
+* If you have been using the [HeaderID](extensions/header_id.html) extension
+to define custom ids on headers, you will want to switch to using the new
+[Attribute List](extensions/attr_list.html) extension. The HeaderId extension
+now only auto-generates ids on headers which have not already had ids defined.
+Note that the [Extra](extensions/extra.html) extension has been switched to use
+Attribute Lists instead of HeaderId as it did previously.
+
+* Some code was moved into the `markdown.util` namespace which was previously
+in the `markdown` namespace. Extension authors may need to adjust a few
+import statements in their extensions to work with the changes.
+
+* The commandline script name was changed to `markdown_py`. The previous name
+(`markdown`) was conflicting with people (and Linux package systems) who also
+had markdown.pl installed on there system as markdown.pl's commandline script
+was also named `markdown`. Be aware that installing Python-Markdown 2.1
+will not remove the old versions of the script with different names. You
+may want to remove them yourself as they are unlikely to work properly.
+
+What's New in Python-Markdown 2.1
+---------------------------------
+
+Three new extensions were added. [Attribute Lists](extensions/attr_list.html),
+which was inspired by Maruku's feature of the same name,
+[Newline to Break](extensions/nl2br.html), which was inspired by Github
+Flavored Markdown, and [Smart Strong](extensions/smart_strong.html), which
+fills a hole in the Extra extension.
+
+HTML5 is now supported. All this really means is that new block level elements
+introduced in the HTML5 spec are now properly recognized as raw HTML. As
+valid HTML5 can consist of either HTML4 or XHTML1, there is no need to add a
+new HTML5 searializers. That said, `html5` and `xhtml5` have been added as
+aliases of the `html4` and `xhtml1` searializers respectively.
+
+An XHTML searializer has been added. Previously, ElementTree's XML searializer
+was being used for XHTML output. With the new searliazer we are able to avoid
+more invalid output like empty elements (i.e., `<p />`) which can choke
+browsers.
+
+Improved support for Python 3.x. Now when running `setupy.py install` in
+Python 3.1 or greater the 2to3 tool is run automatically. Note that Python 3.0
+is not supported due to a bug in its 2to3 tool. If you must use Python-Markdown
+with Python 3.0, it is suggested you manually use Python 3.1's 2to3 tool to
+do a conversion.
+
+Methods on instances of the Markdown class that do not return results can now
+be changed allowing one to do `md.reset().convert(moretext)`.
+
+The Markdown class was refactored so that a subclass could define it's own
+`build_parser` method which would build a completely different parser. In
+other words, one could use the basic machinery in the markdown library to
+build a parser of a different markup language without the overhead of building
+the markdown parser and throwing it away.
+
+Import statements within markdown have been improved so that third party
+libraries can embed the markdown library if they desire (licencing permitting).
+
+Added support for Python's `-m` command line option. You can run the markdown
+package as a command line script. Do `python -m markdown [options] [args]`.
+Note that this is only fully supported in Python 2.7+. Python 2.5 & 2.6
+require you to call the module directly (`markdown.__main__`) rather than
+the package (`markdown`). This does not work in Python 2.4.
+
+The commandline script has been renamed to `markdown_py` which avoids all the
+various problems we had with previous names. Also improved the commandline
+script to accept input on stdin.
+
+The testing framework has been completely rebuilt using the Nose testing
+framework. This provides a number of benefits including the ability to better
+test the builtin extensions and other options available to change the parsing
+behavior. See the [Test Suite](test_suite.html) documentation for details.
+
+Various bug fixes have been made, which are too numerous to list here. See the
+[commit log](https://github.com/waylan/Python-Markdown/commits/master) for a
+complete history of the changes.