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        "author": "Evan Stratford",
        "author_email": "evan.stratford@gmail.com",
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        "classifiers": [
            "Development Status :: 3 - Alpha",
            "Environment :: Web Environment",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: Apache Software License",
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Topic :: Software Development :: Code Generators",
            "Topic :: Software Development :: Libraries :: Python Modules",
            "Topic :: Text Processing :: Markup"
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        "description": "XHPy: XHP for Python\n====================\n\n`XHPy <https://github.com/candu/xhpy>`_ extends Python syntax such that XML document\nfragments become valid Python expressions. It is based off\n`XHP <https://github.com/facebook/xhp>`_, a similar framework for PHP.\n\nAdvantages\n----------\n- *Simplicity*: write UI logic in a simple, expressive syntax without the need for external\n  templates or templating languages.\n\n- *Flexibility*: use Python expressions freely within XHPy tags, and vice-versa.\n\n- *Security*: benefit from automatic escaping of text within XHPy tags.\n\n- *Reusability*: build reusable components by subclassing :x:element.\n\nAn example\n----------\nIn bar.py:\n\n::\n\n    from xhpy.init import register_xhpy_module\n    register_xhpy_module('foo')\n    import foo\n\nIn foo.py:\n\n::\n\n    from xhpy.pylib import *\n    class :ui:foo(:x:element):\n      attribute list bar\n      category %flow\n      def render(self):\n        a = <ul />\n        for b in self.getAttribute('bar'):\n          a.appendChild(<li>{b}</li>)\n        return a\n    print <div class=\"baz\"><ui:foo bar={range(3)} /></div>\n\nWe can now run bar.py as a normal Python script:\n\n::\n\n    $ python bar.py\n    <div class=\"baz\"><ul><li>0</li><li>1</li><li>2</li></ul></div>\n\nCongratulations! You just wrote your first snippet of XHPy.\n\nSyntax\n------\n\nXHPy adds some new syntax to Python. Line by line replay time!\n\n::\n\n    from xhpy.init import register_xhpy_module\n\nThis initializes XHPy and allows you to register modules to be interpreted as XHPy.\n\n::\n\n    register_xhpy_module('foo')\n\nNow the ``foo`` module in ``foo.py`` will be interpreted as XHPy when imported.\nIf ``foo`` were a package, all of its submodules would also be registered; this is\nuseful for registering UI libraries.\n\n::\n\n    import foo\n\nTo actually use XHPy, however, you will probably want the core library:\n\n::\n\n    from xhpy.pylib import *\n\nNow you have access to all the standard HTML 4.0 elements, the ``:x:element`` base class\n(this is what you build custom components on top of!), and some utilities.\n\n::\n\n    class :ui:foo(:x:element):\n\nMaking new components is easy: just subclass ``:x:element``. For your component class to be\nregistered, it must start with ``:`` - this clearly distinguishes your components from\nordinary Python classes.\n\n::\n\n    attribute list bar\n\nThis is an attribute declaration, meaning that ``:ui:foo`` allows bar attributes on ``<ui:foo>``\ntags. Note the\n\n::\n\n    <ui:foo bar={range(3)} />\n\nlater on - like XHP, XHPy uses XML attribute syntax.\n\n::\n\n    category %flow\n\nThis is a category declaration - ``:ui:foo`` is part of the ``%flow`` category. Categories are\nprimarily useful as a way of identifying elements that are similar without using\ninheritance; for example, the ``<a>`` tag in pylib.html has\n\n::\n\n    children (pcdata | %flow)*\n\nindicating that its children must either contain text or be of the ``%flow`` category. (So\nwe can put ``<ui:foo>`` inside ``<a>``!)\n\n::\n\n    def render(self):    \n\nWhen you print an ``:x:element`` (or call ``str`` on it), the ``render()`` method is invoked; this\nis where you put your UI logic.\n\n::\n\n    a = <ul />\n    for b in self.getAttribute('bar'):\n        a.appendChild(<li>{b}</li>)\n    return a\n\nHere, ``<ui:foo>`` is a thin wrapper around ``<ul>`` that allows you to construct an unordered\nlist out of a Python list. Standard HTML elements like ``<ul>`` and ``<li>`` are automatically\nrendered - except that, in XHPy, you can use Python expressions within tags, so that\n\n::\n\n    {b}\n\nis replaced by the value of b. Note the use of ``getAttribute()`` and ``appendChild()``:\n\n::\n\n    self.getAttribute('bar')\n\nfetches the value of attribute ``bar`` (in this case, ``range(3)``), whereas\n\n::\n\n    a.appendChild(<li>{b}</li>)\n\nadds ``<li>{b}</li>`` as a child of ``a = <ul />``.\n\nXHPy is largely based off XHP; for more details on the latter, see the\n`XHP wiki <https://github.com/facebook/xhp/wiki/>`_. The syntax has been adapted for\nPython; in particular:\n\n- there are no semicolons;\n- XHPy class names may be used anywhere ordinary Python classes can;\n- XHPy tags ignore internal whitespace, but must externally obey indentation and\n  line continuation rules.\n  \nMore on the last point:\n\n::\n\n    def foo(href):\n      return <a href={href}></a>\n\n    def bar(href):\n      return\\\n      <a href={href}></a>\n\nare valid, whereas\n\n::\n\n    def foo(href):\n      return\\\n        <a href={href}>\n        </a>\n\nis not, as it introduces an extra dedent after ``</a>``.\n\nHow it works\n------------\nWhen you\n\n::\n\n    import xhpy.init\n\nXHPy installs an `import hook <http://www.python.org/dev/peps/pep-0302/>`_.\nThis hook traps subsequent import statements, running them through a preprocessor\nthat parses a superset of Python. 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