[PyFeyn] Installation error

[George S. Williams]

Hello, Jiang-Hao,

I saw your postings on the PyFeyn mailing list and thought I might be 
able to help. I am not on the list, so I am writing directly to you.

I had problems installing PyFeyn and received the same errors as you; I 
spent about a day working on it.

First I had to uninstall the PyX version that I was using and install 
PyX version 0.11.1

I also had to replace the file <path>/pyfeyn/__init__.py with the one in 
the mailing list post at

http://www.hepforge.org/lists-archive/pyfeyn/2013-September/000109.html

After that, everything is fine.

Hope that this helps with your problem,
George S. Williams