[PyFeyn] I've ported pyfeyn-0.3.5 to python-3 and PyX-0.14

[Georg von Hippel]

Dear Andrey,

thanks a lot! That is very useful! (And sorry for not getting back to you 
about this issue earlier...)

We are currently working on porting pyfeyn to Python3 and PyX>0.12, and 
your patch will be an invaluable help in that effort. (However, we'd 
prefer to keep pyfeyn Python2.7-compatible, since not all code which it 
may be integrated with will be Python3-ready yet.) Of course, your patch 
will be properly credited in the changelog.

I'm still in Mainz (permanently now, in fact), so we'll probably meet when 
you're here.

All the best,

    Georg


On Sun, 24 Jan 2016, Andrey G. Grozin wrote:

> The patch against 0.3.5 (from hepforge.org) attached. Seems to work fine. It 
> was very inconvenient to be unable to upgrade PyX (because only PyX-0.12 
> works with python-2; 0.13 and 0.14 are python-3 only). Now the patched pyfeyn 
> works with python-3 and PyX-0.14. But does not work with python-2 :-( I 
> suppose it could be possible to hack something which works with both python-2 
> and python-3, but I don't know why bother.
>
> BTW, are you in Mainz? I'll stay in Mainz during April-May this year.
>
> Best wishes,
> Andrey
>

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