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>
>>
>> _______________________________________________
>> Mapnik-users mailing list
>> [email protected]
>> https://lists.berlios.de/mailman/listinfo/mapnik-users
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