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from AthenaCommon.AlgSequence import AlgSequence
job=AlgSequence()
from TruthExamples.TruthExamplesConf import PrintMC
PrintMC.PrintStyle = "Vertex"
job += PrintMC()

Transferring To transfer large files from CERN to SLAC (or SLAC to CERN, etc.): See the relevant discussion on hypernewsbbcp is much faster than scp (~15 MB/s compare to ~0.3 MB/s), but use bbcp is not installed at CERN.
Copy it from SLAC (/usr/local/bin/bbcp) to your own CERN area (in my xrootd directory in the following examples):

scp /usr/local/bin/bbcp lxplus.cern.ch:xrootd/bbcp

Note, you can find the Mac binary at /afs/slac.stanford.edu/package/bbcp/prod/bin/ppc_darwin_80/bbcp

To transfer a single file from CERN to SLAC:

~/xrootd/bbcp  -s 64 -P 2 -f notes.txt grenier@noric09.slac.stanford.edu:

To transfer a whole directory:

~/xrootd/bbcp  -s 64 -P 2 -f -r data grenier@noric09.slac.stanford.edu:atlasdata

To transfer from SLAC to CERN:

~/xrootd/bbcp -z -T /usr/local/bin/bbcp -s 64 -P 2 -f grenier@noric09.slac.stanford.edu:notes.txt notes.txt

Some notes from Wei:
1. bbcp uses ssh. So one can avoid typing password by adding your CERN ssh public key to SLAC's authorized key file (~/.ssh/authorized_keys)
2. I am using 64 streams, which is the maximum.
3. -P 2 is not necessary unless you want to see the process bar.

Another note from Gary Buhrmaster, regarding the number of streams:

The number of "optimal" streams varies, and is influenced by the size of the tcp buffers. More streams can actually hurt performance.
There are some tuning suggestion available at: http://pcbunn.cithep.caltech.edu/bbcp/using_bbcp.htm

Usually the default number of streams of ~4 is reasonable, but you want to increase the window size
(i.e. eliminate the '-s 64' and instead add in '-w 2M').
This page descibes its usage.