[Twisted-Python] regarding xml elements

Jean-Paul Calderone exarkun at divmod.com
Fri Mar 28 19:33:50 EDT 2008

On Fri, 28 Mar 2008 22:59:21 -0000, glyph at divmod.com wrote:
>On 02:55 pm, exarkun at divmod.com wrote:
>>On Fri, 28 Mar 2008 10:51:10 -0400, Phil Christensen <phil at bubblehouse.org> 
>>>If it's so bad that you'd tell someone not to use it, why isn't it 
>>Because it would take a lot of work to deprecate, and there are a lot of
>>other things people are working on that are deemed more important.
>Also because there isn't a complete consensus on how terrible it is.  If you 
>are doing advanced XML processing, it definitely isn't the best choice, 
>because it's missing a bunch of features and it has some idiosyncratic 
>behavior.  However, it is conveniently available without adding another 
>dependency and it supports simple use-cases OK; this is still a problem with 
>other XML libraries in Python, especially DOM libraries.  (For example, 
>incompatibilities between the various lxml implementations.)

Here's an example of a behavior it has which probably isn't going to change
any time soon:

    >>> from twisted.web.microdom import parseString
    >>> s = '<div><span>hello</span> <span>world</span></div>'
    >>> parseString(s).toxml()
    '<?xml version="1.0"?><div><span>hello</span><span>world</span></div>'

So if you need such advanced XML features as correct whitespace handling,
steer clear. ;)


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