[PyFeyn] PyFeyn error with fd.draw

[Ian Brock]

Hi Georg,

I used pip to install version PyX 0.13. I got errors from pip when trying to install 0.12.1.
pyfeyn-test1.py still does not work, while pyfeyn-test2.py seems to work?

brock at ltbrock:~/Downloads$ python pyfeyn-test1.py 
/usr/local/texlive/2015/texmf-dist/tex/latex/hepnames/hepnicenames.sty
Traceback (most recent call last):
  File "pyfeyn-test1.py", line 26, in <module>
    fd.draw("pyfeyn-test1.pdf")
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pyfeyn/diagrams.py", line 70, in draw
    c = self.drawToCanvas()
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pyfeyn/diagrams.py", line 62, in drawToCanvas
    obj.draw(self.currentCanvas)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pyfeyn/lines.py", line 522, in draw
    ass, bs, cs = para.normpath_selfintersections(mypath.normpath(), epsilon=0.01)
TypeError: normpath_selfintersections() missing 1 required positional argument: 'eps_comparepairs'
brock at ltbrock:~/Downloads$ python pyfeyn-test2.py 
/usr/local/texlive/2015/texmf-dist/tex/latex/hepnames/hepnicenames.sty
Ignoring line 16918 in mapping file 'pdftex.map': Unknown token '<MinLibBol'
Ignoring line 16919 in mapping file 'pdftex.map': Unknown token '<MinLibBol'
Ignoring line 16920 in mapping file 'pdftex.map': Unknown token '<MinLibBol'
Ignoring line 16921 in mapping file 'pdftex.map': Unknown token '<MinLibBolIta'
Ignoring line 16922 in mapping file 'pdftex.map': Unknown token '<MinLibBolIta'
Ignoring line 16923 in mapping file 'pdftex.map': Unknown token '<MinLibBolIta'
Ignoring line 16924 in mapping file 'pdftex.map': Unknown token '<MinLibIta'
Ignoring line 16925 in mapping file 'pdftex.map': Unknown token '<MinLibIta'
Ignoring line 16926 in mapping file 'pdftex.map': Unknown token '<MinLibIta'
Ignoring line 16927 in mapping file 'pdftex.map': Unknown token '<MinLibReg'
Ignoring line 16928 in mapping file 'pdftex.map': Unknown token '<MinLibReg'
Ignoring line 16929 in mapping file 'pdftex.map': Unknown token '<MinLibReg'

Best Regards
Ian

Ian C. Brock | Physikalisches Institut, Universität Bonn | Nußallee 12 | D-53115 Bonn
Tel. +49 228 733616 | Email: brock at physik.uni-bonn.de <mailto:brock at physik.uni-bonn.de>



> On 07 Jun 2016, at 09:48, Georg von Hippel <hippel at uni-mainz.de> wrote:
> 
> 
> Hi,
> 
> this is a perpetual annoyance with PyX -- it does not provide a stable API, and every time they publish a new version, new workaround code is needed.
> 
> Pyfeyn works with 0.12.x and 0.13.x, but apparently 0.14.x breaks yet another interface (specifically normpath_selfintersections, which appears to require an additional argument). This will need yet another workaround. Ugh.
> 
>> From the name of the required argument eps_comparepairs, I suspect it may 
> be enough to replace the "epsilon=0.01" with simply "0.01" on line 522 of lines.py in order to make the code run (quite possibly with all version of PyX), but that needs checking.
> 
> Best,
> 
>   Georg
> 
> 
> On Mon, 6 Jun 2016, George S. Williams wrote:
> 
>> Hey, Ian,
>> 
>> Sorry you're having a problem with PyFeyn. I think the problem is actually with PyX- they change an API and any code that relied on that API call from a previous version is broken. We've had that problem in the past.
>> 
>> Would you please let us know which versions of PyX and PyFeyn you have installed?
>> 
>> Thanks,
>> George
>> 
>> 
>> On 6/6/2016 12:20 PM, Ian Brock wrote:
>>> Dear PyFeyn,
>>> I get an error when trying to run the first PyFeyn test file:
>>> python pyfeyn-test1.py
>>> /usr/local/texlive/2015/texmf-dist/tex/latex/hepnames/hepnicenames.sty
>>> Traceback (most recent call last):
>>>  File "pyfeyn-test1.py", line 26, in <module>
>>> fd.draw("pyfeyn-test1.pdf")
>>>  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pyfeyn/diagrams.py", line 70, in draw
>>>    c = self.drawToCanvas()
>>>  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pyfeyn/diagrams.py", line 62, in drawToCanvas
>>> obj.draw(self.currentCanvas)
>>>  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pyfeyn/lines.py", line 522, in draw
>>>    ass, bs, cs = para.normpath_selfintersections(mypath.normpath(), epsilon=0.01)
>>> TypeError: normpath_selfintersections() missing 1 required positional argument: 'eps_comparepairs'
>>> I am using Python3.5 installed via Macports.
>>> I installed PyX and PyFeyn via pip. This worked without any error messages.
>>> I tested hepnames in test file and it works fine.
>>> Best Regards
>>> Ian
>>> *Ian C. Brock* | Physikalisches Institut, Universität Bonn | Nußallee 12 | D-53115 Bonn
>>> Tel. +49 228 733616 | Email: brock at physik.uni-bonn.de <mailto:brock at physik.uni-bonn.de> <mailto:brock at physik.uni-bonn.de <mailto:brock at physik.uni-bonn.de>>
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>> 
>> 
>> 
>> 
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> 
> -- 
> ===========================================================================
> 
> PD Dr. Georg von Hippel
> Institut für Kernphysik                 Office: 01-226 (Neubau)
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