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There are a number of (very good) templating systems and languages available for Python. They fall in to one of two camps; either they are XML based, like Genshi, or they are text based, like Mako. Most programmers favour one or the other, but there is far from a consensus over which is better.
I'd like to use this debate to gather reasons for using one over the other in the context of web development. I suspect there will be no clear winner, but it should serve as a useful resource for those faced with the decision!
NB. You can post code with the [code] bbcode tag. Many languages are supported. e.g.
[code python]
print "Hello, World!"
[/code]
XML-based transformation tools such as XSLT, but also hand-written Python DOM manipulators or SAX parsers, work with XML-based templates out of the box. This may help if a large number of templates exist that need to be transformed according to common guidelines. Of course text-based transformation tools can be used for text-based templates as well, but these will have more limited knowledge of the structure of the underlying pages and may be more error-prone. In addition such text-based techniques of course still work with XML-based templates.