[PyFeyn] Bug in pyfeyn package

[Georg von Hippel]

Dear I. H. Bridle,

Thank you for your bug report. Unfortunately, PyX does not provide a 
particularly stable interface -- in version 0.11.1 (the most recent one I 
tested PyFeyn with), the boolean argument to _arrowhead() that you 
highlighted did not exist, and the call as implemented in Arrow.decorate() 
was correct. I don't really know what to do about this kind of problem 
other than to mandate a particular version of PyX to be used with PyFeyn, 
which would seem a bit heavy-handed ...

Best regards,

    Georg

-- 
============================================================================

  Dr. Georg von Hippel
  Institut für Kernphysik                 Phone:  +49 6131 39-22933
  Johannes Gutenberg-Universität Mainz    Fax:    +49 6131 39-22964
  Johann-Joachim-Becher-Weg 45            Email:  hippel at kph.uni-mainz.de
  55099 Mainz, Germany

============================================================================


On Fri, 11 Jan 2013, Bridle I.H. wrote:

> Dear A. Buckley and G. von Hippel,
>
>      After installing PyX 0.12.1 and Pyfeyn 0.3.2 today I ran some of your example scripts and found an error in pyfeyn\deco.py on line 27. The pyx.deco._arrowhead function is missing an argument and should read
> "pyx.deco._arrowhead(arrowtopath, self.pos*dp.path.arclen(), 1, self.size, 45, 1, constrictionlen)",
> where I have underlined the boolean "constriction" that was missing (see pyx.deco._arrowhead help).
>
> Thank you for your work,
>
> Mr I. H. Bridle
>
> SHEP,
>
> University of Southampton,
>
> Southampton,
>
> SO17 1BJ
>
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