Chameleon 2.9.2

Chameleon is a Python module that compiles templates to Python byte-code. It includes a complete implementation of the Zope Page Templates (ZPT) language.

The engine itself performs 10-15 times better than the reference implementation and real-world benchmarks show an overall performance improvement in complex applications of 30-50%.

License

This software is made available under the BSD license.

Development

The code is maintained in a subversion repository:

svn://svn.repoze.org/svn/chameleon/trunk

If you want to contribute or need support, join #repoze on freenode irc or write the mailinglist.
Languages

An implementation of the Zope Page Templates language is included. The Genshi language has been implemented and is currently maintained in a separate package.

Zope Page Templates

The ZPT implementation is largely compatible with the reference implementation. Below is an overview of notable differences:

Default expression

 The default expression is python:. Path expressions are not supported in the base package. The package introduces the import: expression which imports global names.

Tuple unpacking

 The tal:define and tal:repeat clauses supports tuple unpacking:

 tal:define="(a, b, c) [1, 2, 3]"

 The star character is not supported.

Dot-notation for dictionary lookups

 If attribute lookup fails (i.e. the dot operator), dictionary lookup is tried. The engine replaces attribute lookups with a call to a function that has the following body:

 try:
 return context.key
 except AttributeError:
 try:
 return context[key]
 except KeyError:
 raise AttributeError(key)

Interpolation is supported

 The Genshi expression interpolation syntax is supported outside tags and inside static attributes:

 < span class="hello-${'world'}" >
 Hello, ${'world'}!
 < /span >

Literal insertion

 If objects for insertion provide an __html__ method, it will be called and the result inserted literally, without escaping.


Product's homepage

Requirements:

· Python

What's New in This Release: [ read full changelog ]

· Fixed a PyPy incompatibility.
· Fixed issue #109 which caused testing failures on some platforms.