The OPAL Discussion Forum

["Adelmann Andreas (PSI)" <andreas.adelmann AT psi.ch>]

Begin forwarded message:

From: Suzanne Sheehy <suzie.sheehy AT physics.ox.ac.uk>

Subject: python and ROOT with OPAL

Date: 23 Nov 2016 19:38:42 CET

To: Chris Rogers <chris.rogers AT stfc.ac.uk>, "Adelmann Andreas (PSI)" <andreas.adelmann AT psi.ch>

Hi Chris and Andreas,

Sorry for my (perhaps) daft questions, and not much to do with OPAL technically, it’s more a “how is your system set up for this?” question…

I found the current setup in 'lattices/KurriMainRingWithAcceleration/KurriMainRingWithAcceleration.in the particle just oscillates about 11 MeV energy, rather than accelerating, so after playing with the starting phase but with no luck, I decided I needed to re-do the frequency pattern. so then I was testing the find_rf_freq.py script (in SCRIPTS) and ran into an issue.

The issue is quite simple, it is just that Chris’ script needs pyROOT. Now, ROOT comes packaged up with the OPAL binaries, so I’d ideally just like to use that version (ROOT V5).

But the OPAL packaged version doesn’t seem to come with ROOT.py to enable pyROOT to run (i.e. despite setting the paths, python cannot find or invoke ROOT, which is required in some of Chris’ scripts such as ‘find_rf_freq.py’) 

Originally I had ROOT V6 installed separately on my system as well, but this sprung a different error (although I did not update it since changing to Mac OS X Sierra so this may have been the problem there).

Andreas - is there a way to use the packaged version of ROOT with PyROOT?

Or do you think I should just re-install ROOT V6 and invoke that for Chris’ script, while using ROOT V5 with OPAL for the H5ROOT stuff? 

A view of my environment variables etc, below… 

suzie-mb-air:~ Suzie$ echo $ROOTSYS

/Users/Suzie/Physics/OPAL-1.4.0-1

suzie-mb-air:~ Suzie$ echo $PYTHONPATH

:/Users/Suzie/Physics/OPAL-1.4.0-1/bin/ROOT:/Library/Python/2.7/site-packages:/Users/Suzie/Physics/KURRIFFAG/JUNE15/KURRI_analysis_scripts/defs

suzie-mb-air:~ Suzie$ which python

/usr/bin/python

suzie-mb-air:~ Suzie$ which ROOT

/Users/Suzie/Physics/OPAL-1.4.0-1/bin/ROOT

suzie-mb-air:~ Suzie$ python

Python 2.7.10 (default, Jul 14 2015, 19:46:27) 

[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)] on darwin

Type "help", "copyright", "credits" or "license" for more information.

>>> import ROOT

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

ImportError: No module named ROOT

>>>