[PyFeyn] PyFeyn updates

[Atri Bhattacharya]

Dear Dr. Andy Buckley and Dr. Georg von Hippel
I was a regular user of your excellent PyFeyn software until a few
years ago and am very grateful to you for developing it.

Recently, upon requiring some high-quality Feynman diagrams for a
presentation, I turned to PyFeyn again, but I found, to my dismay, that
it no longer worked with recent PyX releases.

I figured most of the fixes to restore compatibility with PyX, say
version 0.15, would be straightforward --- and indeed most of them
were! I have documented my commits at [1] and am happy to inform you
that as of commit 3005e6b, PyFeyn now works with PyX 0.15. In addition,
I have also tried to fix a few minor issues (e.g. with the end points
of some 3D lines).

I thought I would let you know and see if you may be interested in
reviewing the commits or just generally giving me your comments and
suggestions.

Thank you and best wishes,

[1] https://bitbucket.org/badshah400/pyfeyn/src/master/
-- 
Atri Bhattacharya
Space sciences, Technologies and Astrophysics Research (STAR) Institute,
Université de Liège, Bât. B5a, Sart Tilman, 4000 Liège, Belgium
Phone: +32 4 366 36 38
http://www.theo.phys.ulg.ac.be/wiki/Bhattacharya_Atri

Mon 24 Aug 00:59:38 CEST 2020

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