Nabble - Python - xml-sig

Re: Python XML

2009-12-01T14:05:49Z

+--
| To process XML from Python ...
| What is the best library ?
| http://pyxml.sourceforge.net/topics/books.html is officially not
| supported / maintained anymore
| There is the libxml2 but there are not much response on google (at first sight).
|
| Any relevant pointers would be appreciated :)
+--

We have an official publication, freely available as a Web
page or PDF, on my favorite package, lxml:

http://www.nmt.edu/tcc/help/pubs/pylxml/

It's fast, easy to use, and suitable for reading, writing
or updating XML content. It does not address installation;
it is a user-level publication.

Best regards,
John Shipman (john@...), Applications Specialist, NM Tech Computer Center,
Speare 119, Socorro, NM 87801, (505) 835-5950, http://www.nmt.edu/~john
``Let's go outside and commiserate with nature.'' --Dave Farber
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Re: Python XML

2009-12-01T06:57:14Z

On Tue, Dec 1, 2009 at 4:03 AM, Thomas Lionel Smets <tsmets@...> wrote:
> Dear,
>
> To process XML from Python ...
> What is the best library ?
> http://pyxml.sourceforge.net/topics/books.html is officially not
> supported / maintained anymore
> There is the libxml2 but there are not much response on google (at first sight).
>
> Any relevant pointers would be appreciated :)

Much depends on how you want to process the XML. If you want a
Pythonic API that treats an XML instance like a tree, then use
ElementTree, which is available in the standard library but is also
implemented in the lxml package [1]. The standard library also
includes serviceable SAX and DOM implementations. If you want simple,
fast, event-driven parsing, try the expat module in the standard
library.

If you want to use XPath and XSLT 1.0, or if you want to validate
against DTDs or RNG schemata, install the excellent lxml package,
which uses libxml2 and libxslt under the hood for much of what it
does. It also has good tools for working with HTML. lxml has become
my own toolset of choice for working with XML in Python, partly
because I love XSLT.

There are other tools that I haven't gotten around to trying yet, such
as 4Suite [2] and Amara [3]. Perhaps others can say something about
them, but you should also search the archives of this list to learn
more about them on your own.

[1] <http://codespeak.net/lxml/>
[2] <http://4suite.org/index.xhtml>
[3] <http://www.xml3k.org/Amara>

Chuck

>
> Tx,
>
> \T,
>
> --
> Thomas SMETS
> rue J. Wytsmanstraat 62
> 1050 Brussels
> m. : +32 497 44 68 12
> _______________________________________________
> XML-SIG maillist - XML-SIG@...
> http://mail.python.org/mailman/listinfo/xml-sig
>

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Python XML

2009-12-01T02:03:25Z

Dear,

To process XML from Python ...
What is the best library ?
http://pyxml.sourceforge.net/topics/books.html is officially not
supported / maintained anymore
There is the libxml2 but there are not much response on google (at first sight).

Any relevant pointers would be appreciated :)

Tx,

\T,

--
Thomas SMETS
rue J. Wytsmanstraat 62
1050 Brussels
m. : +32 497 44 68 12
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Re: PyXML installation in Zope2.8.5

2009-11-19T18:40:34Z

Thanks Dieter. I will try this.

With regards

Sudesh

From: Dieter Maurer <dieter@...>
To: Sudesh Soni <soni_sks@...>
Cc: xml-sig@...
Sent: Thu, November 19, 2009 2:14:28 AM
Subject: Re: [XML-SIG] PyXML installation in Zope2.8.5

Sudesh Soni wrote at 2009-11-18 08:14 -0800:
>Thanks Dieter,
>
>Other than gzip file and I could find an exe for PYXML installation , but the problem is that, during installation it cannot locate the python2.3 that is in zope 2.8 itself, instead it looks in the windows registry.
>Suggest.

I am sure there is a workaround. Unfortunately, I am no Windows expert...

Under *nix, I have seen a similar situation and approached it as follows:

Situation: Operating system distributions often come with their own
python package and associated extension packages. Their package management
makes it often far more easy to install an OS package than
generate a Python package by hand (at least before "easy_install" and PyPI).

Approach: Install via the operating system package management
and then copy the files and directories over to the Python installation
you need them in. Of course, this requires that the OS Python
is similar enough to the target Python.

I do not know where the standard Python is installed under Windows.
But, the registry should tell you.
The relevant directory contains probably some
"\lib\python<version>\site-packages". ("\lib\python<version>" might be missing
unter Windows). There subdirectories containing "xml" are relevant
and need to be copied to the target Python installation.

Probably, there is an easier approach. I expect (but am not sure)
that the installer can be told via a parameter to use a secondary
Python installation. Look whether you can find installation instructions.
Or try typical ways to determine what parameters can be provided
to an executable ("<exe> /help", "<exe> /h", or similar).

--
Dieter

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Re: [xml-dev] [ANN] Python XML Schema Bindings 1.0.0

2009-11-19T15:02:09Z

An RNC version would be especially nice thing to see.
Leigh.

-----Original Message-----
From: Peter A. Bigot [mailto:bigotp@...]
... PyXB is only appropriate where an XML schema is already available or useful for other reasons...
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Re: [xml-dev] [ANN] Python XML Schema Bindings 1.0.0

2009-11-19T14:45:42Z

Uche Ogbuji wrote:

> On Wed, Nov 18, 2009 at 5:01 PM, Peter A. Bigot <bigotp@...
> <mailto:bigotp@...>> wrote:
>
> PyXB version 1.0.0 is now available from SourceForge at:
> http://sourceforge.net/projects/pyxb/
>
> PyXB (Python XML Schema Bindings; "pixbee") is a pure Python
> package that generates Python source code for classes that
> correspond to data structures defined by XMLSchema. In concept it
> is similar to JAXB for Java and CodeSynthesis XSD for C++. The
> current release supports XML Schema 1.0.
>
> This looks like impressive work.

Thank you.
>
> I must say, though, aren't static-language-style data bindings rather
> rigid, and counter to the spirit of Python? Of course, I develop a
> tool with a very different philosophy [1], but perhaps it's possible
> to probe the matter with use-cases.
A dislike of static structures is certainly a prevalent view among
Python aficionados, even those who tolerate XML. I don't expect to get
much attention from people who are building systems where they are in
full control of both client and server implementation; many of those
have no motivation to use XML at all, and would be better off using
pickled data structures or JSON for data persistence and
inter/intra-system communication.

The driving environment for PyXB's development is a community of
engineers who use Python to compose applications from existing
capabilities in multiple languages (primarily Fortran and C++). The
execution model and development environment of Java do not suit their
culture. They are being asked to publish interfaces to their systems in
an enterprise-wide service-oriented architecture, and to make use of
services provided by others. The environment mandates an
industry-supported standard for interfaces that can be accessed through
a machine-readable service definition, rather than a vendor-provided
language-specific library. Java and C++ both have tools that support
XML as a solution for this problem; Python has historically been less
mature.

When operating with XML-based services that define their interfaces with
schema, static bindings simplify both service provider and client. In
some cases it may be easy in Python to consume a service's XML without a
binding, but to produce a document that is certain to conform to the
service requirements can be quite a bit more effort. This is especially
true for complex descriptions like the Geography Markup Language.

For these situations, my hope is that PyXB will help eliminate the overt
intrusion of XML into the code of an end user who really only wants to
use (or provide) the service. PyXB is only appropriate where an XML
schema is already available or useful for other reasons. That the
current version nearly insists upon doing validation of input and output
will make it unsuitable for some of those cases, though that's an issue
that would be straightforward to address.

Peter

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Re: PyXML installation in Zope2.8.5

2009-11-18T23:14:28Z

Sudesh Soni wrote at 2009-11-18 08:14 -0800:
>Thanks Dieter,
>
>Other than gzip file and I could find an exe for PYXML installation , but the problem is that, during installation it cannot locate the python2.3 that is in zope 2.8 itself, instead it looks in the windows registry.
>Suggest.

I am sure there is a workaround. Unfortunately, I am no Windows expert...

Under *nix, I have seen a similar situation and approached it as follows:

Situation: Operating system distributions often come with their own
python package and associated extension packages. Their package management
makes it often far more easy to install an OS package than
generate a Python package by hand (at least before "easy_install" and PyPI).

Approach: Install via the operating system package management
and then copy the files and directories over to the Python installation
you need them in. Of course, this requires that the OS Python
is similar enough to the target Python.

I do not know where the standard Python is installed under Windows.
But, the registry should tell you.
The relevant directory contains probably some
"\lib\python<version>\site-packages". ("\lib\python<version>" might be missing
unter Windows). There subdirectories containing "xml" are relevant
and need to be copied to the target Python installation.

Probably, there is an easier approach. I expect (but am not sure)
that the installer can be told via a parameter to use a secondary
Python installation. Look whether you can find installation instructions.
Or try typical ways to determine what parameters can be provided
to an executable ("<exe> /help", "<exe> /h", or similar).

--
Dieter
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[ANN] Python XML Schema Bindings 1.0.0

2009-11-18T16:05:07Z

PyXB version 1.0.0 is now available from SourceForge at:
http://sourceforge.net/projects/pyxb/

PyXB (Python XML Schema Bindings; "pixbee") is a pure Python package
that generates Python source code for classes that correspond to data
structures defined by XMLSchema. In concept it is similar to JAXB for
Java and CodeSynthesis XSD for C++. The current release supports XML
Schema 1.0.

Version 1.0.0 is feature-complete and suitable for production
development where validation of incoming and generated documents is
desired. The following schema constructs are supported:

* Class constants corresponding to string enumeration constraints
* Simple and complex type definitions
* List and union datatypes
* Constraints on (simple) datatypes (e.g., minInclusive, length)
* Model groups and attribute groups
* Complex content models (all, sequence, choice); minOccurs and
maxOccurs
* Abstract types, xsi:type, substitution groups
* Nillable elements with xsi:nil
* Namespace qualified attributes and elements
* Documentation annotations present in the schema are converted to
Python docstrings in the generated bindings.
* Pattern constraints (as long as the simple type derives from
something that is represented as a Python string)

The full distribution includes generated bindings for twenty-three
namespaces related to web services (including several versions of SOAP
and WSDL), and twenty-eight namespaces from the Open Geospatial
Consortium's Geographic Information System schema.

For further information and links to the support forum and mailing list,
please consult the documentation available at: http://pyxb.sourceforge.net/

Peter

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Re: PyXML installation in Zope2.8.5

2009-11-18T08:23:29Z

Thanks Mike for valuable information.

The python version is 2.3.5 that comes along with Zope.

I am trying to use ZSI 2.0 [Zope Solera Interface] with my zope server to be able to utilize web services. During the installation of this package it looks for PyXML, so I downloaded PyXML and got stuck with issue. I have not researched which part of PyXML is needed in ZSI, but I will try to find out.

Regards

Sudesh

From: Mike Brown <mike@...>
To: Sudesh Soni <soni_sks@...>
Cc: xml-sig@...
Sent: Tue, November 17, 2009 11:18:41 PM
Subject: Re: [XML-SIG] PyXML installation in Zope2.8.5

PyXML has two 'extension' modules (modules written in C instead of Python):

_xmlplus.parsers.pyexpat (needed by PyExpat)
_xmlplus.parsers.sgmlop (needed by sgmlop)

After they're built and installed, they become accessible as
xml.parsers.pyexpat and xml.parsers.sgmlop, respectively.

You can't build Python C extension modules without a C compiler, and, for
reasons we must just accept, it has to be the same compiler that was used to
make the Python executable you're using. You apparently don't have the
compiler you need installed. Maybe you don't have one at all. That's why you
got the error message. The compiler you're being told you need is Visual
Studio 6 / VC6, which is old but not free (officially). This also suggests
you're using Windows, so it's probably worth mentioning whether you're using
ActiveState's Python or the official python.org distribution, as it can make a
difference when people try to help you.

But first I would take a step back and ask why you need PyXML.
Which component of PyXML do you think you need, and why?

You mentioned Zope. AFAIK, PyXML is only needed for Martijn Faassen's "XPath
Methods" product. That product relies on PyXML and the venerable 4Suite
0.11.1. Is this why you're trying to get PyXML installed? You might be better
off looking for a Zope product which gives you access to ElementTree, if not
lxml.etree.

My ability to help you, in any case, is going to be limited. I just wanted
to help you understand the error message and get you to explain more about
what you're trying to accomplish.

Sudesh Soni wrote:

> The version of PyXML is 0.8.4
> Product - zope 2.8.5 final [python version - 2.3.5]
> I get following error when executing -
>
> python setup.py build
>
> ============
> running build_ext
> error: Python was built with version 6 of Visual Studio, and extensions need
> to be built with the same version of the compiler, but it isn't installed.

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Re: PyXML installation in Zope2.8.5

2009-11-18T08:14:32Z

Thanks Dieter,

Other than gzip file and I could find an exe for PYXML installation , but the problem is that, during installation it cannot locate the python2.3 that is in zope 2.8 itself, instead it looks in the windows registry.

Suggest.

Regards

Sudesh

From: Dieter Maurer <dieter@...>
To: Sudesh Soni <soni_sks@...>
Cc: xml-sig@...
Sent: Wed, November 18, 2009 1:35:10 AM
Subject: Re: [XML-SIG] PyXML installation in Zope2.8.5

Sudesh Soni wrote at 2009-11-17 08:50 -0800:

>Product - zope 2.8.5 final [python version - 2.3.5]
>
>I get following error when executing -
>
>python setup.py build
>
>============
>running build_ext
>error: Python was built with version 6 of Visual Studio, and extensions need to be built with the sa
>me version of the compiler, but it isn't installed.

"PyXML" contains extensions written in "C".
When you build "PyXML" yourself, these extensions need to be compiled.
To be compatible with Python, these compilations need to use essentially
the same compiler as the one used for Python. Your observed error:
The required compiler (version 6 of Visual Studio) is not available on
your system.

Almost surely, there are prebuilt "PyXML" binaries for Windows.
Your easiest option is to install one of them
and do not try to build "PyXML" yourself.

--
Dieter

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Re: PyXML installation in Zope2.8.5

2009-11-17T22:35:10Z

Sudesh Soni wrote at 2009-11-17 08:50 -0800:

Re: PyXML installation in Zope2.8.5

2009-11-17T20:18:41Z

PyXML has two 'extension' modules (modules written in C instead of Python):

_xmlplus.parsers.pyexpat (needed by PyExpat)
_xmlplus.parsers.sgmlop (needed by sgmlop)

After they're built and installed, they become accessible as
xml.parsers.pyexpat and xml.parsers.sgmlop, respectively.

You can't build Python C extension modules without a C compiler, and, for
reasons we must just accept, it has to be the same compiler that was used to
make the Python executable you're using. You apparently don't have the
compiler you need installed. Maybe you don't have one at all. That's why you
got the error message. The compiler you're being told you need is Visual
Studio 6 / VC6, which is old but not free (officially). This also suggests
you're using Windows, so it's probably worth mentioning whether you're using
ActiveState's Python or the official python.org distribution, as it can make a
difference when people try to help you.

But first I would take a step back and ask why you need PyXML.
Which component of PyXML do you think you need, and why?

You mentioned Zope. AFAIK, PyXML is only needed for Martijn Faassen's "XPath
Methods" product. That product relies on PyXML and the venerable 4Suite
0.11.1. Is this why you're trying to get PyXML installed? You might be better
off looking for a Zope product which gives you access to ElementTree, if not
lxml.etree.

My ability to help you, in any case, is going to be limited. I just wanted
to help you understand the error message and get you to explain more about
what you're trying to accomplish.

Sudesh Soni wrote:

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Re: PyXML installation in Zope2.8.5

2009-11-17T08:54:13Z

The version of PyXML is 0.8.4

From: Sudesh Soni <soni_sks@...>
To: xml-sig@...
Sent: Tue, November 17, 2009 11:50:22 AM
Subject: PyXML installation in Zope2.8.5

Hi,

Product - zope 2.8.5 final [python version - 2.3.5]

I get following error when executing -

python setup.py build

============

running build_ext
error: Python was built with version 6 of Visual Studio, and extensions need to be built with the sa
me version of the compiler, but it isn't installed.

==============

Help!

Regards

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PyXML installation in Zope2.8.5

2009-11-17T08:50:22Z

Hi,

Product - zope 2.8.5 final [python version - 2.3.5]

I get following error when executing -

python setup.py build

============

running build_ext
error: Python was built with version 6 of Visual Studio, and extensions need to be built with the sa
me version of the compiler, but it isn't installed.

==============

Help!

Regards

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Re: Status of pyxml development

2009-11-05T14:05:19Z

>>> Did I miss an announcement of its retirement?
>> Most likely so. I posted an announcement to this list when I stopped
>> maintaining it. This was four years ago.
>
> I was talking about the page at http://pyxml.sourceforge.net/, which says what
> PyXML is. This page only went missing within the last year.

I don't recall the details; I think somebody requested that the old (and
outdated) content was removed.

Regardless - PyXML has been unmaintained much longer.

Regards,
Martin
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Re: Status of pyxml development

2009-11-05T13:57:56Z

"Martin v. Lis" wrote:
> Mike Brown wrote:
> > Did I miss an announcement of its retirement?
>
> Most likely so. I posted an announcement to this list when I stopped
> maintaining it. This was four years ago.

I was talking about the page at http://pyxml.sourceforge.net/, which says what
PyXML is. This page only went missing within the last year.
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Re: Status of pyxml development

2009-11-05T13:40:57Z

Mike Brown wrote:
> Did I miss an announcement of its retirement?

Most likely so. I posted an announcement to this list when I stopped
maintaining it. This was four years ago.

Regards,
Martin
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Re: Status of pyxml development

2009-10-22T17:06:07Z

Stefan Behnel wrote:
> Nicolas Delaby wrote:
> > I would like to know what is the status of pyxml ? I saw on sourceforge
> > that it is no longer maintained but i want to have a confirmation.
>
> The sourceforge site has been stating the truth for a while now.

True, but at the moment, only the project page says that.
<http://pyxml.sourceforge.net/> and
<http://pyxml.sourceforge.net/topics/> are the top 2 Google hits for "pyxml"
and don't mention anything about it. In fact the former seems to have recently
gone missing. Did I miss an announcement of its retirement? It used to look
like this: <http://web.archive.org/web/20080429132440/http://pyxml.sourceforge.net/>

I suggest restoring something (anything) to
<http://sourceforge.net/projects/pyxml/> to say what the PyXML project is,
that it's no longer maintained, and to link to the other sites, if not also to
say that a new maintainer would be welcomed despite the declining usefulness
of the package.

I also suggest putting a "PyXML is no longer maintained" on the old topics
subpage.

Mike
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New xml_marshaller

2009-10-22T04:03:31Z

Hi,
The generic marshal module has been published on Pypi with support of
namespaces.
It uses lxml as backend parser.

http://pypi.python.org/pypi/xml_marshaller/0.9

source: https://svn.erp5.org/erp5/trunk/utils/xml_marshaller/

This code will be maintained by erp5 developers.

Regards,
Nicolas
--
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Nexedi: Consulting and Development of Libre / Open Source Software
http://www.nexedi.com/
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Re: Status of pyxml development

2009-10-22T00:32:53Z

Stefan Behnel a écrit :

> Hi,
>
> Nicolas Delaby wrote:
>> I would like to know what is the status of pyxml ? I saw on sourceforge
>> that it is no longer maintained but i want to have a confirmation.
>
> The sourceforge site has been stating the truth for a while now.
>
>
>> So i'm using a interesting module of the pyxml library: the Marshaller.
>> I played a bit with and find some weakness like non support of namespaces.
>>
>> I reimplemented it with lxml (may be its a troll in this mailing-list,
>> sorry in advance) with full support of namespaces.
>>
>> How can i contribute ? do i need to fork this code ?
>
> I think the best way to have people use your code is to put it into a new
> package and put it up on PyPI. If it keeps up compatibility with the PyXML
> marshaller, the better. That will allow users of the marshaller package
> (however many there may be left) to easily migrate to your package.
>

Hi Stefan,
Thanks for your reply, it is what i expect :)
I didn't change the regular tests, so it should be still compatible with
PyXML implementation.
So I will publish it on PyPI and send an announcement on this mailing-list

Regards,
Nicolas

--
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Nexedi: Consulting and Development of Libre / Open Source Software
http://www.nexedi.com/
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Re: Status of pyxml development

2009-10-21T10:31:19Z

Hi,

Nicolas Delaby wrote:
> I would like to know what is the status of pyxml ? I saw on sourceforge
> that it is no longer maintained but i want to have a confirmation.

The sourceforge site has been stating the truth for a while now.

> So i'm using a interesting module of the pyxml library: the Marshaller.
> I played a bit with and find some weakness like non support of namespaces.
>
> I reimplemented it with lxml (may be its a troll in this mailing-list,
> sorry in advance) with full support of namespaces.
>
> How can i contribute ? do i need to fork this code ?

I think the best way to have people use your code is to put it into a new
package and put it up on PyPI. If it keeps up compatibility with the PyXML
marshaller, the better. That will allow users of the marshaller package
(however many there may be left) to easily migrate to your package.

Stefan

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Status of pyxml development

2009-10-21T09:39:44Z

Hi all,
I would like to know what is the status of pyxml ? I saw on sourceforge
that it is no longer maintained but i want to have a confirmation.

So i'm using a interesting module of the pyxml library: the Marshaller.
I played a bit with and find some weakness like non support of namespaces.

I reimplemented it with lxml (may be its a troll in this mailing-list,
sorry in advance) with full support of namespaces.

How can i contribute ? do i need to fork this code ?
Do you have suggestions ?

Regards,
Nicolas

*Here the output of the test with defautl behaviour:*
Testing XML marshalling...
<marshal><none/></marshal>
<marshal><int>1</int></marshal>
<marshal><long>10633823966279326983230456482242756608</long></marshal>
<marshal><float>19.72</float></marshal>
<marshal><complex>1.0 5.0</complex></marshal>
<marshal><string>here is a string & a <fake
tag></string></marshal>
<marshal><tuple><int>1</int><int>2</int><int>3</int></tuple></marshal>
<marshal><list
id="i2"><string>alpha</string><string>beta</string><string>gamma</string></list></marshal>
<marshal><dictionary
id="i2"><int>1</int><int>2</int><string>key</string><string>value</string></dictionary></marshal>
<marshal><object id="i2" module="__main__"
class="_A"><tuple/><dictionary id="i3"><string>self</string><reference
id="i2"/><string>subobject</string><object id="i4" module="__main__"
class="_B"><tuple/><dictionary id="i5"><string>list</string><list
id="i6"><none/><int>1</int><long>10633823966279326983230456482242756608</long><float>19.72</float><complex>1.0
5.0</complex><string>here is a string & a <fake
tag></string></list></dictionary></object></dictionary></object></marshal>
<marshal><list
id="i2"><none/><int>1</int><long>10301051460877537453973547267843</long><dictionary
id="i3"><int>1</int><string>spam</string><int>2</int><string>eggs</string></dictionary><string><fake
tag></string><complex>1.0 5.0</complex><reference
id="i2"/></list></marshal>
<marshal><object id="i2" module="__main__"
class="_A"><tuple/><dictionary id="i3"><string>self</string><reference
id="i2"/><string>subobject</string><object id="i4" module="__main__"
class="_B"><tuple/><dictionary id="i5"><string>list</string><list
id="i6"><none/><int>1</int><long>10633823966279326983230456482242756608</long><float>19.72</float><complex>1.0
5.0</complex><string>here is a string & a <fake
tag></string></list></dictionary></object></dictionary></object></marshal>

*Here the output of the test with namespace support:*
m = Marshaller(namespace_uri='http://www.erp5.org/namespaces/marshaller')
dumps = m.dumps

Testing XML marshalling...
<marshal:marshal
xmlns:marshal="http://www.erp5.org/namespaces/marshaller"><marshal:none/></marshal:marshal>
<marshal:marshal
xmlns:marshal="http://www.erp5.org/namespaces/marshaller"><marshal:int>1</marshal:int></marshal:marshal>
<marshal:marshal
xmlns:marshal="http://www.erp5.org/namespaces/marshaller"><marshal:long>10633823966279326983230456482242756608</marshal:long></marshal:marshal>
<marshal:marshal
xmlns:marshal="http://www.erp5.org/namespaces/marshaller"><marshal:float>19.72</marshal:float></marshal:marshal>
<marshal:marshal
xmlns:marshal="http://www.erp5.org/namespaces/marshaller"><marshal:complex>1.0
5.0</marshal:complex></marshal:marshal>
<marshal:marshal
xmlns:marshal="http://www.erp5.org/namespaces/marshaller"><marshal:string>here
is a string & a <fake
tag></marshal:string></marshal:marshal>
<marshal:marshal
xmlns:marshal="http://www.erp5.org/namespaces/marshaller"><marshal:tuple><marshal:int>1</marshal:int><marshal:int>2</marshal:int><marshal:int>3</marshal:int></marshal:tuple></marshal:marshal>
<marshal:marshal
xmlns:marshal="http://www.erp5.org/namespaces/marshaller"><marshal:list
id="i2"><marshal:string>alpha</marshal:string><marshal:string>beta</marshal:string><marshal:string>gamma</marshal:string></marshal:list></marshal:marshal>
<marshal:marshal
xmlns:marshal="http://www.erp5.org/namespaces/marshaller"><marshal:dictionary
id="i2"><marshal:int>1</marshal:int><marshal:int>2</marshal:int><marshal:string>key</marshal:string><marshal:string>value</marshal:string></marshal:dictionary></marshal:marshal>
<marshal:marshal
xmlns:marshal="http://www.erp5.org/namespaces/marshaller"><marshal:object
id="i2" module="__main__" class="_A"><marshal:tuple/><marshal:dictionary
id="i3"><marshal:string>self</marshal:string><marshal:reference
id="i2"/><marshal:string>subobject</marshal:string><marshal:object
id="i4" module="__main__" class="_B"><marshal:tuple/><marshal:dictionary
id="i5"><marshal:string>list</marshal:string><marshal:list
id="i6"><marshal:none/><marshal:int>1</marshal:int><marshal:long>10633823966279326983230456482242756608</marshal:long><marshal:float>19.72</marshal:float><marshal:complex>1.0
5.0</marshal:complex><marshal:string>here is a string & a
<fake
tag></marshal:string></marshal:list></marshal:dictionary></marshal:object></marshal:dictionary></marshal:object></marshal:marshal>
<marshal:marshal
xmlns:marshal="http://www.erp5.org/namespaces/marshaller"><marshal:list
id="i2"><marshal:none/><marshal:int>1</marshal:int><marshal:long>10301051460877537453973547267843</marshal:long><marshal:dictionary
id="i3"><marshal:int>1</marshal:int><marshal:string>spam</marshal:string><marshal:int>2</marshal:int><marshal:string>eggs</marshal:string></marshal:dictionary><marshal:string><fake
tag></marshal:string><marshal:complex>1.0
5.0</marshal:complex><marshal:reference
id="i2"/></marshal:list></marshal:marshal>

--
Nicolas Delaby
Nexedi: Consulting and Development of Libre / Open Source Software
http://www.nexedi.com/
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Re: Text file to XML representation

2009-10-21T07:18:17Z

Antonis Kaklis wrote:

> I would like to make a program that takes a text file with the
> following representation for example:
>
> outlook = sunny
> | humidity <= 70: yes (2.0)
> | humidity > 70: no (3.0)
> outlook = overcast: yes (4.0)
> outlook = rainy
> | windy = TRUE: no (2.0)
> | windy = FALSE: yes (3.0)
>
> and convert it to xml file

Did you read the response that you got over at c.l.py?

Stefan
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Text file to XML representation

2009-10-21T06:49:07Z

Hello,
I would like to make a program that takes a text file with the
following representation for example:

outlook = sunny
| humidity <= 70: yes (2.0)
| humidity > 70: no (3.0)
outlook = overcast: yes (4.0)
outlook = rainy
| windy = TRUE: no (2.0)
| windy = FALSE: yes (3.0)

and convert it to xml file for example:

<?xml version="1.0" encoding="UTF-8"?>
<DecisionTree type="DescisionTree">
<Test attribute="outlook" operator="=" value="sunny">
<Test attribute="humidity" operator="<=" value="70">
<Output decision="yes" info="(2.0)"/>
</Test>
<Test attribute="humidity" operator=">" value="70">
<Output decision="no" info="(3.0)"/>
</Test>
</Test>
<Test attribute="outlook" operator="=" value="overcast">
<Output decision="yes" info="(4.0)"/>
</Test>
<Test attribute="outlook" operator="=" value="rainy">
<Test attribute="windy" operator="=" value="TRUE">
<Output decision="no" info="(2.0)"/>
</Test>
<Test attribute="windy" operator="=" value="FALSE">
<Output decision="yes" info="(3.0)"/>
</Test>
</Test>
</DecisionTree>

Is there a way to do it? I'm new to XML processing With Python
Please help(code, tips anything)
Thanks in advance
Antonis
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[ pyxml-XBEL-2875536 ] 'as' is the keyword in python2.6

2009-10-09T00:42:45Z

XBEL item #2875536, was opened at 2009-10-09 15:42
Message generated for change (Tracker Item Submitted) made by sevenj
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=707658&aid=2875536&group_id=6473

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: None
Group: None
Status: Open
Priority: 5
Private: No
Submitted By: sevenj (sevenj)
Assigned to: Nobody/Anonymous (nobody)
Summary: 'as' is the keyword in python2.6

Initial Comment:
In these files: _xmlplus/xpath/ParsedAbbreviatedAbsoluteLocationPath.py
_xmlplus/xpath/ParsedAbbreviatedRelativeLocationPath.py, use the keyword
'as'.

----------------------------------------------------------------------

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ANN: Updated Python/XML Binding release available

2009-09-19T10:28:15Z

Several months ago I announced the initial public release of PyXB, a
pure Python package that generates Python bindings from XML schema.
PyXB is now feature-complete at version 0.7.3, with an expected posting
of the stable version 1.0.0 by the end of September. The documentation
is at http://pyxb.sourceforge.net, and the release can be downloaded
from links on that page.

PyXB supports almost all features of XML schema, including:

* Class constants corresponding to string enumeration constraints
* Simple and complex type definitions
* List and union datatypes
* Constraints on (simple) datatypes (e.g., minInclusive, length)
* Model groups and attribute groups
* Complex content models (all, sequence, choice); minOccurs and
maxOccurs
* Abstract types, xsi:type, substitution groups
* Nillable elements with xsi:nil
* Namespace qualified attributes and elements
* Import and include directives
* Documentation annotations present in the schema are converted to
Python docstrings in the generated bindings.
* Pattern constraints (as long as the simple type derives from
something that is represented as a Python string)

The full package includes bindings for almost two dozen WS-*--related
schema including SOAP and WSDL, and the complete set of schema for
OpenGIS. Its limitations are that it has only crude support for
bindings that do not validate, does not support the "redefine"
directive, and is not always as informative regarding why a particular
document is invalid as one might wish.

A users mailing list is available at
http://sourceforge.net/mailarchive/forum.php?forum_name=pyxb-users. I
would appreciate any feedback.

Peter

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Re: Modify node attributes in XML file while parsing

2009-09-17T00:47:40Z

<?xml version='1.0'?>
<main_tag>

<service name='abc' version='1'>
    <instance name='default' value='false'/>
</service>
<service name='xyz' version='2'>
    <instance name='default' value='false'/>
</service>

</main_tag>

is how the XML file looks like. I want to modify the value of instance based on the service name.

So if i search for abc service & modify instance value like follows :

import sys, logging, traceback
from xml.dom import minidom

data_file = "/tmp/data.xml"

def main():
    try:
        xmldoc = minidom.parse(data_file)
    except IOError:
        print "err"
        sys.exit(1)

    start = xmldoc.firstChild

    for element in xmldoc.getElementsByTagName("service"):
        service = element.getAttribute("name")
        print service
        if service == "abc":
            for instance in element.childNodes:
                if instance.nodeType == 1:
                    print instance.getAttribute("value")
                    instance.setAttribute("value", "true")
                    print instance.getAttribute("value")

if __name__ == "__main__":
    logging.basicConfig(filename=log_file,level=logging.DEBUG)
    main()

The first print gives false & later one gives true. But the data.xml remains unchanged. How can I modify the node in data.xml?

Thanks,
Abhishek

On Wed, Sep 16, 2009 at 9:47 PM, Josh English <joshua.r.english@...> wrote:

If you are just searching for XML nodes, you are searching. If you are
interpreting them into something new, you are parsing.

If you want to change an attribute, parse the XML file and make changes there.

Either that, or read the node attribute that you are given, make the
changes you need, but don't bother with writing a new XML file.

Perhaps a sample of what you are trying to do would help up see the solution.

On 9/16/09, Abhishek Kane <abhishek.kane@...> wrote:
> Hi Guys,
>
> I got a bit idea about parsing XML file from online search. I need to modify
> node attributes in an XML file while I read it. I could read node
> attributes; but when I modify them using setAttribute, the local copy of
> that node gets changed.
> Is there any way to directly modify the node attributes in XML file or shall
> I just create another XML file where I will create nodes as I go through the
> nodes in old XML file?
>
> Thanks,
> Abhishek
>

--
Josh English
Joshua.R.English@...
http://joshenglish.livejournal.com

--
No defeat is final; until u stop fighting.
- AGK

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Re: Modify node attributes in XML file while parsing

2009-09-16T17:24:55Z

Everything works, but you need to write this over data.xml. I don't
remember how to do this in minidom. I think writing to an output file
is the only way to do this:

o = open('data.xml')
o.write(xmldoc.toxml())
o.close()

On Wed, Sep 16, 2009 at 9:58 AM, Abhishek Kane <abhishek.kane@...> wrote:

> <?xml version='1.0'?>
> <main_tag>
>
> <service name='abc' version='1'>
>     <instance name='default' value='false'/>
> </service>
> <service name='xyz' version='2'>
>     <instance name='default' value='false'/>
> </service>
>
> </main_tag>
>
>
> is how the XML file looks like. I want to modify the value of instance
> based on the service name.
>
> So if i search for abc service & modify instance value like follows :
>
>
> import sys, logging, traceback
> from xml.dom import minidom
>
> data_file = "/tmp/data.xml"
>
> def main():
>     try:
>         xmldoc = minidom.parse(data_file)
>     except IOError:
>         print "err"
>         sys.exit(1)
>
>     start = xmldoc.firstChild
>
>     for element in xmldoc.getElementsByTagName("service"):
>         service = element.getAttribute("name")
>         print service
>         if service == "abc":
>             for instance in element.childNodes:
>                 if instance.nodeType == 1:
>                     print instance.getAttribute("value")
>                     instance.setAttribute("value", "true")
>                     print instance.getAttribute("value")
>
> if __name__ == "__main__":
>     logging.basicConfig(filename=log_file,level=logging.DEBUG)
>     main()
>
> The first print gives false & later one gives true. But the data.xml remains
> unchanged. How can I modify the node in data.xml?
>
> Thanks,
> Abhishek
>
> On Wed, Sep 16, 2009 at 9:47 PM, Josh English <joshua.r.english@...>
> wrote:
>>
>> If you are just searching for XML nodes, you are searching. If you are
>> interpreting them into something new, you are parsing.
>>
>> If you want to change an attribute, parse the XML file and make changes
>> there.
>>
>> Either that, or read the node attribute that you are given, make the
>> changes you need, but don't bother with writing a new XML file.
>>
>> Perhaps a sample of what you are trying to do would help up see the
>> solution.
>>
>> On 9/16/09, Abhishek Kane <abhishek.kane@...> wrote:
>> > Hi Guys,
>> >
>> > I got a bit idea about parsing XML file from online search. I need to
>> > modify
>> > node attributes in an XML file while I read it. I could read node
>> > attributes; but when I modify them using setAttribute, the local copy of
>> > that node gets changed.
>> > Is there any way to directly modify the node attributes in XML file or
>> > shall
>> > I just create another XML file where I will create nodes as I go through
>> > the
>> > nodes in old XML file?
>> >
>> > Thanks,
>> > Abhishek
>> >
>>
>>
>> --
>> Josh English
>> Joshua.R.English@...
>> http://joshenglish.livejournal.com
>
>
>
> --
> No defeat is final; until u stop fighting.
> - AGK
>
>

--
Josh English
Joshua.R.English@...
http://joshenglish.livejournal.com
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Re: Modify node attributes in XML file while parsing

2009-09-16T10:20:06Z

Abhishek Kane wrote:
> I got a bit idea about parsing XML file from online search. I need to modify
> node attributes in an XML file while I read it. I could read node
> attributes; but when I modify them using setAttribute, the local copy of
> that node gets changed.
> Is there any way to directly modify the node attributes in XML file or shall
> I just create another XML file where I will create nodes as I go through the
> nodes in old XML file?

Could you explain a bit more about your intentions? What is the code doing?
I understand that the XML data is in a file that you parse, but where is
the data going afterwards? Do you use it in your program? Do you save it
back into a file?

Stefan
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Modify node attributes in XML file while parsing

2009-09-16T08:33:48Z

Hi Guys,

I got a bit idea about parsing XML file from online search. I need to modify node attributes in an XML file while I read it. I could read node attributes; but when I modify them using setAttribute, the local copy of that node gets changed.
Is there any way to directly modify the node attributes in XML file or shall I just create another XML file where I will create nodes as I go through the nodes in old XML file?

Thanks,
Abhishek

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Re: Does Python libexpat and EXPAT

2009-08-21T08:11:57Z

Hi,

please don't top-post.

hari wrote:

> On Aug 21, 2:37 am, Stefan Behnel wrote:
>> hari wrote:
>>> Am very new to XML, I have a query, Does Python libexpat and EXPAT
>>> are same or they are diffrent?
>> Depends on what you mean with "EXPAT". Python's expat module that you can
>> find in the standard library is the well known non-validating XML parser
>> originally written by James Clark.
>>
>> BTW, if you are new to XML and want to use it in Python, you might want to
>> start with the xml.etree package.
>
> Thanks, now I want to know is whether Expat is used as the base for
> developing Python libexpat.

That's what I said above: the Python module is based on the expat parser.

Note that the xml.etree package also uses the expat parser, but that's only
one of the reasons why it's so fast.

Stefan
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Re: Does Python libexpat and EXPAT

2009-08-20T17:16:34Z

Hi ,
Thanks, now I want to know is whether Expat is used as the base for
developing Python libexpat. Sorry to keep on asking questions.

-Hari

On Aug 21, 2:37 am, Stefan Behnel <stefan...@...> wrote:

> Hi,
>
> copying my answer from comp.lang.python:
>
> hari wrote:
> > Hi all,
>
> > Am very new to XML, I have a query, Does Python libexpat and EXPAT
> > are same or they are diffrent?
>
> Depends on what you mean with "EXPAT". Python's expat module that you can
> find in the standard library is the well known non-validating XML parser
> originally written by James Clark.
>
> BTW, if you are new to XML and want to use it in Python, you might want to
> start with the xml.etree package.
>
> Stefan
>
> _______________________________________________
> XML-SIG maillist - XML-...@...://mail.python.org/mailman/listinfo/xml-sig

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Re: Does Python libexpat and EXPAT

2009-08-20T10:37:06Z

Hi,

copying my answer from comp.lang.python:

hari wrote:
> Hi all,
>
> Am very new to XML, I have a query, Does Python libexpat and EXPAT
> are same or they are diffrent?

Depends on what you mean with "EXPAT". Python's expat module that you can
find in the standard library is the well known non-validating XML parser
originally written by James Clark.

BTW, if you are new to XML and want to use it in Python, you might want to
start with the xml.etree package.

Stefan

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Does Python libexpat and EXPAT

2009-08-20T06:48:18Z

Hi all,

Am very new to XML, I have a query, Does Python libexpat and EXPAT
are same or they are diffrent?

Thanks in advance.

Regards,
Hari

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Re: python parser project

2009-07-21T15:09:50Z

Hi Uche:

Its my opinion that you coud do this easily with lxml for the XML part. Just Google "Python LXML"

Look at this page http://codespeak.net/lxml/tutorial.html

The txt file is easy to handle with the split(',') command.

The thing I don't know what you are talking it's about sending the XML to a SQL Database, it's easier to handle the text file in SQL bulk insert command, etc..

Regards,

Jose Rivera

On Tue, Jul 21, 2009 at 12:19 PM, uche <uraniumore238@...> wrote:

Hi All,

I am developing a python parsing program. This program takes two
inputs a comma dilimeted txt file and an xml file, which represents
the structure of the datafile. I am using python minidom to read in
the xml file and create a tree structure in an object file. The next
thing to do is to insert the data into the respective fields of the
tree. Once I am done, I'd like to send this object to an sql database.
Has anyone attempted to do this ? Is there an example code online that
I can reference to ? ... More specifically what code will allow me to
combine the data and tree structure into a complete object that I can
use to populate the sql database ?

Thanks.
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