SAM INSTRUCTIONS THAT WORK FOR ME
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0. setup sam

1. Choose a list of files:

sam translate constraints --dim="data_tier
  root-tuple and file_name %all%p11% and
  create_date > 05/01/2002 and
  create_date < 05/03/2002"

  Other data_tier: reconstructed
                   raw
  Note: % is a wild card.
    Caution: File sizes in KBytes!

2. Define a dataset with these files:

sam define dataset --group=dzero 
  --defname=bh030702 --dim="data_tier
  root-tuple and file_name %all%p11% and
  create_date > 05/01/2002 and
  create_date < 05/03/2002"

Note: bh030702 is the name given to the
  dataset in this example.

3. Copy files of dataset "bh030702" to your disk:

  From D0mino:                    ! Or whatever
    a) cp /www-d0/room3/WWW/docs/Run2Physics/wz/docs/howto/get_file.py .
                              ! You only have to do this once eevr.
    b) edit get_file.py  
       i) Change the project_definition to the one above
      ii) Change the field "/prj_root/808/mtst_1/group_datafiles/" to 
          the directory in which you want your file to land.
    c) setup sam
    d) sam run project get_file.py  ! That's all folks.

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And this is the contents of get_file.py:

import os, sys, time

############################################################################
#
project_definition = "bh250705"
sam_station        = os.environ['SAM_STATION']
snapshot_version   = 'new'
appname            = 'generic'
version            = "1"
group              = "dzero"
max_file_amt       = 1000

##verbosity          = "--verbose"
verbosity           = ""

# Give up on all exceptions
give_up            = 1


def file_ready(filename):
    now = time.strftime( '%H:%M:%S', time.localtime(time.time()) )
    print("<%s> MY PROJECT: working on a file named >%s<" % (now,filename))
    # Modify the destination below to copy the files somewhere
    os.system('cp %s /work/naia-clued0/bruce1/2MU_skim_dataset259972/' % filename)
    return

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And this is the contents of the obsolete get_file.py:


#!/usr/bin/env python
#
# This file sets up and runs a SAM project.
#
import os, sys, string, time, signal
from re import *
from globals import *
import run_project

############################################################################
#
#  Set the following variables to appropriate values

# Consult database for valid choices
sam_station        = "central-analysis"

# Consult Database for valid choices
project_definition = "119216"

# A particular snapshot version, last or new
snapshot_version   = 'new'

# Consult database for valid choices
appname            = "test"
version            = "1"
group              = "dzero"


# The maximum number of files to get from sam
max_file_amt       = 160

# for additional debug info use "--verbose"
##verbosity          = "--verbose"
verbosity           = ""

# Give up on all exceptions
give_up            = 1


def file_ready(filename):
    # Replace this python subroutine with whatever you want to do
    # to process the file that was retrieved.
    # Your program will only be called in the event of
    # a successful delivery.
    #

    print 'Transferring file: '
    print filename
    print ' to commissioning disk 808.'
    os.system('ls -l %s'%filename)
    os.system('cp %s /prj_root/808/mtst_1/group_datafiles/. '%filename)
    #time.sleep(10)
    return
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