On 03/08/2012 12:35 PM, Michael Droettboom wrote:
It shouldn't be a problem to build a compatibility shim -- I'd much
rather do that than have multiple functions
Oops -- hit send too soon. I meant to say "I'd much rather do that than
have multiple functions that do virtually the same thing"
Mike
Mike
On 03/08/2012 12:16 PM, Benjamin Root wrote:
On Thu, Mar 8, 2012 at 10:47 AM, John Hunter <jdh2...@gmail.com
<mailto:jdh2...@gmail.com>> wrote:
On Thu, Mar 8, 2012 at 10:32 AM, Benjamin Root <ben.r...@ou.edu
<mailto:ben.r...@ou.edu>> wrote:
+1 as well. I just took another look at the Path object and
I see no such function. The lack of this function is a
problem for me as well in my existing apps. In order to
deprecate nxutils, this functionality needs to be added to
Path. Otherwise, nxutils *must* be reinstated before the
next release.
Michael has already agreed to make a nxutils compatibility layer
that would have the same interface as the old nxutils. So we are
talking about performance, not core functionality.
We should remember that Michael did the lion's share of the work
on porting mpl to python 3
(https://github.com/matplotlib/matplotlib/pull/565/commits). He
elected not to port all of the C++ if he could replace some of
the functionality with the core. So those who rely on bare metal
speed the you are getting in nxutils should step up to either :
1) help with the port of nxutils to python 3
2) help with exposing methods in _path.cpp that are almost as
fast or faster
3) live with slower speeds in the compatibility layer he has
agreed to write
4) ask (nicely) for someone to help you
I prefer option 2 because this is fairly easy and avoids code
redundancy. It would take just a few lines of extra code to do
this with the python sequence protocol as inputs and python lists
as return values. It would take a bit more to support numpy
arrays as input and output, and we should get input from Michael
about the desirability of making _path.cpp depend on numpy. I
don't see the harm, but I'd like to verify.
In my opinion, a slower implementation in a
nxutils.py compatibility module is not a release stopper, even if
it is undesirable.
JDH
Don't get me wrong. If help is needed, I can certainly provide it
since it is my itch. I am just a little exasperated with how this
issue has been handled up to now. The shim is a very good idea and
it should have been done back when the py3k merge happened. I didn't
press the issue then because I was traveling and didn't have time to
examine the issue closely, and having _nxutils.so still in my build
hide the problem from me (my own fault).
As for shim implementation, I would be willing to accept a slightly
slower function now (with the promise of improvements later), but if
the implementation is too much slower, then effort will need to be
made to get it up to acceptable levels. I know of several users
**cough**my future employer**cough** who uses functionality such as
this, and they would not be happy if their products are dragged down
by such a bottleneck.
Probably about time I dug more into CXX wrapped stuff...
Ben Root
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