cElementTree dependency breaks PyPy usage

[Adam Faulconbridge]

PyPy aims to speed up Python programs, but doesnt work with NetworkX due to dependancy on the C implementation of element tree. This can easily be fixed:

In networkx/readwrite/gexf.py line 29

from xml.etree.cElementTree import ElementTree, Element, tostring

should be replaced with

try:

    from xml.etree.cElementTree import ElementTree, Element, tostring

except ImportError:

    from xml.etree.ElementTree import ElementTree, Element, tostring

I've tried raising a trac ticket for this, but the system doesnt work for me.

[Aric Hagberg]

It did work Anonymous tickets are moderated, see
https://networkx.lanl.gov/trac/ticket/549
And please feel free to test to make sure that fix is correct.

Aric

[Chris Wj]

Have you (anyone) tried pypy with NetworkX recently? Is there a good speed up? Are there parts that don't work besides the one identified here?

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[Aric Hagberg]

On Thu, May 12, 2011 at 12:30 PM, Chris Wj <chri...@gmail.com> wrote:
> Have you (anyone) tried pypy with NetworkX recently? Is there a good speed
> up? Are there parts that don't work besides the one identified here?

I just tried to run the tests and there are some failures (including
some that crash/hang the interpreter).
But most of NetworkX (including the base classes) works fine.

There are some benchmarks in
http://networkx.lanl.gov/svn/networkx/trunk/networkx/tests/benchmark.py
that we could try to see about performance.

Can you help make NetworkX work with pypy?

Aric

[Chris Wj]

I think making NetworkX work with pypy would be a great project to hack on. I will look to spend some time doing so as soon as I finish my current project and the semester ends (Monday)! I used NetworkX in a diffusion network graph reproduction for my project; http://diffusionsim.sf.net if anyone is interested :).

Aric