XML-based template compiler.
Project description
Overview
Chameleon 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.
Changes
1.0 (released 2009-11-01)
Features:
HTML5 doctype is now supported.
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