Re: [ANN] pyxser-0.2r --- Python XML Serialization

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Stefan Behnel <stefan_ml@xxxxxxxxx>
on Sunday 19 April 2009 15:08
wrote in comp.lang.python:


Daniel Molina Wegener wrote:
Stefan Behnel <stefan_ml@xxxxxxxxx>
on Sunday 19 April 2009 02:25
wrote in comp.lang.python:


Daniel Molina Wegener wrote:
* Every serilization is made into unicode objects.
Hmm, does that mean that when I serialise, I get a unicode object back?
What about the XML declaration? How can a user create well-formed XML
from your output? Or is that not the intention?

Yes, if you serialize an object you get an XML string as
unicode object, since unicode objects supports UTF-8 and
some other encodings.

That's not what I meant. I was wondering why you chose to use a unicode
string instead of a byte string (which XML is defined for). If your only
intention is to deserialise the unicode string into a tree, that may be
acceptable. However, as soon as you start writing the data to a file or
through a network pipe, or pass it to an XML parser, you'd better make it
well-formed XML. So you either need to encode it as UTF-8 (for which you
do not need a declaration), or you will need to encode it in a different
byte encoding, and then prepend a declaration yourself. In any case, this
is a lot more overhead (and cumbersome for users) than writing out a
correctly serialised byte string directly.

Sorry, it appears that I've misunderstand your question. By /unicode
objects/ I mean /python unicode objects/ aka /python unicode strings/.
Most of them can be reencoded into /latin*/ strings and then /ascii/
strings if is that what you want. But for most communications, suchs as
Java systems, utf-8 encoding goes as default. I've made pyxser to
generate interoperability between python and other systems.


You seemed to be very interested in good performance, so I don't quite
understand why you want to require an additional step with a relatively
high performance impact that only makes it harder for users to use the
tool correctly.

Stefan

Atte.
- --
.O. | Daniel Molina Wegener | FreeBSD & Linux
..O | dmw [at] coder [dot] cl | Open Standards
OOO | http://coder.cl/ | FOSS Developer

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