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(login to a cori login node, then execute this command which allocates a node for you to use for 1 hour)
salloc -C knl -N 1 -t 1:00:00 -q interactive -A m2859lcls --image=docker:slaclcls/lcls-py2-root:latest

(once that command completes)
shifter /bin/bash  (get a shell in the shifter image)
source /img/conda.local/env.sh   (setup conda)
source activate psana_base  (activate the appropriate conda environment)
export SIT_PSDM_DATA=/global/cscratch1/sd/psdatmgr/data/psdm

(psana_base) cpo@nid02387:~$ more ~/junk.py
from psana import *
dsource = MPIDataSource('exp=mfx11116:run=602:dir=/global/cscratch1/sd/psdatmgr/data/psdm/MFX/mfx11116/xtc:smd')
det = Detector('Jungfrau1M')
for nevt,evt in enumerate(dsource.events()):
   calib = det.calib(evt)
   if calib is None:
      print 'none'
   else:
      print calib.shape
   if nevt>5: break
(psana_base) cpo@nid02387:~$ python junk.py
(2, 512, 1024)
(2, 512, 1024)
(2, 512, 1024)
(2, 512, 1024)
(2, 512, 1024)
(2, 512, 1024)
(2, 512, 1024)
(psana_base) cpo@nid02387:~$