[issue17741] event-driven XML parser

[Antoine Pitrou]

Antoine Pitrou added the comment:

> <rant>It's easy to say that as a core developer with commit rights
> who can simply hide changes in a low frequented bug tracker without
> notifying those who have to know about these changes.</rant> It's
> pure luck I noticed this change during the alpha release cycle.

It is the rule for most stdlib improvements that they go directly
through the bug tracker. Most core developers and outsiders
would feel swamped by the traffic if all feature additions went
through the mailing-list.

I'm honestly baffled that you think I am trying to "hide" things.
Why do you think I would feel guilty about proposing an addition,
or try to sneak things inside xml.etree?

(yes, we could theoretically run polls for every addition
we propose, collect and discuss the results, and iterate several
times until the outcome is successful; I don't think any of us
has the bandwidth to do that, which is why that practice is
only used for game-making changes (i.e. PEP material))

> I'm also not arguing about naming. I'm questioning the design, trying
> to get it into a shape that fits the existing APIs. Why do we need
> two incremental parsing interfaces in one and the same library that
> use completely different method names, although doing otherwise
> exactly the same?

Well, unless I'm missing something, TreeBuilder doesn't do parsing,
it takes already parsed data: it has a start() method to open a tag,
and a data() method to add raw text inside that tag. IncrementalParser,
OTOH, has a data_received() method to which you pass a piece of
non-parsed XML string.

The other incremental parsing API is actually iterparse(). The
reason I proposed IncrementalParser is that iterparse() is useless
for non-blocking applications. IncrementalParser produces the same
kind of output as iterparse(), but control of when to feed it data
is transferred to the user of the API.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17741>
_______________________________________