[PyFeyn] PyFeyn error with fd.draw

[Georg von Hippel]

Hi Ian,

PyX 0.12.x is for Python 2.x and won't work with Python 3.x. I'm confused 
about the error using PyX 0.13, though -- are you sure that it isn't 
actually using the more recent version of PyX still?

Best,

    Georg


On Tue, 7 Jun 2016, Ian Brock wrote:

> 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
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