Hmm, looks like I guessed wrong which Cascadenik version you are running.
How did you download and install Cascadenik?
Dane
On Nov 3, 2010, at 12:21 PM, Christoph Lingg | komoot wrote:
> Hi Dane,
>
> thank you for your answer! I installed lxml and i can successfully import the
> bindings in python:
>> import lxml.etree
>
> I changed the corresponding code in cascadenik-compile.py:
>> #try:
>> # import xml.etree.ElementTree as ElementTree
>> # from xml.etree.ElementTree import Element
>> #except ImportError:
>> try:
>> import lxml.etree as ElementTree
>> from lxml.etree import Element
>> except ImportError:
>> import elementtree.ElementTree as ElementTree
>> from elementtree.ElementTree import Element
>
> But still, I get a different error:
>> cascadenik-compile.py example.mml > test.xml
>> Traceback (most recent call last):
>> File "/usr/local/bin/cascadenik-compile.py", line 114, in <module>
>> sys.exit(main(layersfile, **options.__dict__))
>> File "/usr/local/bin/cascadenik-compile.py", line 46, in main
>> doc.write(f)
>> AttributeError: 'lxml.etree._Element' object has no attribute 'write'
>
>
> The corresponding code looks like:
>> if kwargs.get('pretty'):
>> doc = ElementTree.fromstring(open(filename, 'rb').read())
>> print doc
>> cascadenik._compile.indent(doc)
>> f = open(filename, 'wb')
>> doc.write(f)
>> f.close()
>
> I have never worked with lxml yet, but it seems weird: the _Element Class
> doesn't has a write function, see
>> http://codespeak.net/lxml/api/lxml.etree._Element-class.html
>
> But the ElementTree does it, and I think this was in mind.
>> http://codespeak.net/lxml/api/lxml.etree._ElementTree-class.html
>
> Well, the pretty option didn't seem to be important, I skipped the if block
> and now compile.py works without errors. I assume this change doesn't affect
> the result, I will have to check it!
>
> Thanks Dane for your help, If i can contribute anything to fix this bug, let
> me know!
>
> Bye,
> Christoph
>
> Am 03.11.2010 um 00:21 schrieb Dane Springmeyer:
>
>> Hi Christoph,
>>
>> Yes, sorry this is a bug, fixed in the Cascadenik development version (but I
>> don't recommed using the dev version yet).
>>
>> Basically it looks like you are using the latest release via pypi and in
>> that version there are several imports at the top of cascadenik/compile.py
>> which attempt to allow fallbacks to different xml parsers that implement an
>> etree interface.
>>
>> lxml (python bindings to libxml2) is preferred and it turns out its
>> interface is slightly different and while it has doc.write() others may not.
>>
>> So, the easiest way to fix this issues is to install lxml. On ubuntu I think
>> that is:
>>
>> sudo apt-get install python-lxml
>>
>> Dane
>>
>>
>> On Nov 2, 2010, at 2:10 PM, Christoph Lingg | komoot wrote:
>>
>>> Hi list,
>>>
>>> I recently installed cascadenik on a new server and encountered an error
>>> while compiling my mml file. First I thought this might be due a wrong mml
>>> file, but even the example given by cascadenik doesn't work:
>>>
>>>> christ...@server:~/mapnik-Cascadenik-796acf2$ cascadenik-compile.py
>>>> example.mml > test.xml
>>>> Traceback (most recent call last):
>>>> File "/usr/local/bin/cascadenik-compile.py", line 114, in <module>
>>>> sys.exit(main(layersfile, **options.__dict__))
>>>> File "/usr/local/bin/cascadenik-compile.py", line 46, in main
>>>> doc.write(f)
>>>> AttributeError: _ElementInterface instance has no attribute 'write'
>>>
>>>
>>> I am quite lost and would be very happy if somebody knows more about this
>>> issue!
>>>
>>> Thanks a lot in advance!
>>> Christoph
>>>
>>> PS:
>>> I am running Ubuntu 10.10 and the content of test.xml looks like:
>>>> cat test.xml
>>>> <Element Map at 26c7fc8>
>>>
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>>> Mapnik-users mailing list
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>>> https://lists.berlios.de/mailman/listinfo/mapnik-users
>
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