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/usr/bin/rivet-chopbins is in rivet 1.8.3-1.1.

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The actual contents of the file can be viewed below.

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#! /usr/bin/env python

"""%prog -b <HISTO/PATH:min:max> [ -b ... ] <AIDAFILE> [...]

Strip specified bins from data sets. Histograms not specified will be passed
through without any chopping. Bins to be kept can be specified on command
line via `-b' options. The format is
    -b AIDAPATH:start:stop
where start and stop are x values contained in the first and last bins,
respectively, that should be kept. They need not to be the bin-center but
must only lie somewhere in the bin's x-range.

To chop bins from different observables can be achieved by using the `-b'
option multiple times.

Example:
    %prog -b /ALEPH_1996_S3486095/d03-x01-y01:0.095:0.27 out.aida
This will give you the all bins of the ALEPH 1-T distribution that are
between the bins that contain the x-values 0.095 and 0.27 .

TODO:
    * what if the same observable is mentioned multiple times?
"""

import sys
if sys.version_info[:3] < (2,4,0):
    print "rivet scripts require Python version >= 2.4.0... exiting"
    sys.exit(1)


import os, logging
import lighthisto

## Try to load faster but non-standard cElementTree module
try:
    import xml.etree.cElementTree as ET
except ImportError:
    try:
        import cElementTree as ET
    except ImportError:
        try:
            import xml.etree.ElementTree as ET
        except:
            sys.stderr.write("Can't load the ElementTree XML parser: please install it!\n")
            sys.exit(1)

def getBindef(line):
    """ Try to read bin definitions (xlow, xhigh) from single
        string.
    """
    splitline = line.strip().split()
    try:
        path, low, high = splitline[0].split(":")
    except:
        logging.error("No bin-definition given for %s" % (line.strip()))
        sys.exit(1)
    if low == "":
        low = None
    else:
        low = float(low)
    if high == "":
        high = None
    else:
        high = float(high)

    return (path, low, high)


def readObservableFile(obsfile):
    """ Read observables to normalise from file obsfile.
        Return-values are a list of the histo-names to normalise and a
        dictionary with name:newarea entries.
    """
    bindefs = {}

    if obsfile is not None:
        try:
            f = open(obsfile, 'r')
        except:
            logging.error("Cannot open histo list file %s" % opts.OBSFILE)
            sys.exit(2)
        for line in f:
            stripped = line.strip()
            # Skip empty or commented lines
            if len(stripped) == 0 or stripped.startswith("#"):
                continue

            # Split the line to find out whether newarea is given in obsfile
            path, low, high = getBindef(line)
            bindefs[path] = (low, high)
        f.close()
    return bindefs

if __name__ == "__main__":
    from optparse import OptionParser, OptionGroup
    parser = OptionParser(usage=__doc__)

    parser.add_option("-b", "--bins",
                      action="append",
                      help="Specify a histogram and bin range that is to be"
                           " kept. The format is `AIDAPATH:start:stop'.")
    parser.add_option("-O", "--obsfile", default=None,
                      help="Specify a file with bin-definitions to chop")
    parser.add_option("-o", "--out",
                      dest="outdir",
                      help="output directory (default: %default)")
    parser.add_option("-i", "--in-place", dest="IN_PLACE", default=False, action="store_true",
                      help="Overwrite input file rather than making input-chop.aida")

    verbgroup = OptionGroup(parser, "Verbosity control")
    verbgroup.add_option("-v", "--verbose", action="store_const",
                         const=logging.DEBUG, dest="LOGLEVEL",
                         help="print debug (very verbose) messages")
    verbgroup.add_option("-q", "--quiet", action="store_const",
                         const=logging.WARNING, dest="LOGLEVEL",
                         help="be very quiet")
    parser.set_defaults(bins=[],
            outdir=".",
            LOGLEVEL=logging.INFO)
    opts, args = parser.parse_args()


    ## Configure logging
    logging.basicConfig(level=opts.LOGLEVEL, format="%(message)s")


    if len(args) == 0:
        sys.stderr.write("Must specify at least one AIDA histogram file!\n")
        sys.exit(1)
    if len(opts.bins) == 0 and not opts.obsfile:
        sys.stderr.write("No bins specified, so I'm doing nothing!\n")
        sys.exit(1)


    # Read in bin-definitions from file
    if opts.obsfile:
        bindefs = readObservableFile(opts.obsfile)

    # If no file is given, try reading bin-definitions from CLOptions
    else:
        bindefs = {}
        for bd in opts.bins:
            try:
                path, low, high = getBindef(bd)
                bindefs[path] = (low, high)
            except:
                sys.stderr.write("Problem parsing bin definition `%s'" % (bd))
                sys.exit(1)

    for aidafile in args:
        if not os.access(aidafile, os.R_OK):
            logging.error("%s can not be read" % aidafile)
            break

        base, ext = os.path.splitext(os.path.basename(aidafile))

        ## Create output filename
        base = args[0].split(".aida")[0]
        if len(args) > 1:
            outfile = args[1]
        else:
            if not opts.IN_PLACE:
                base += "-chop"
            outfile = base + ".aida"

        chopfile = os.path.join(opts.outdir, outfile)
        outhistos = []

        tree = ET.parse(aidafile)
        for dps in tree.findall("dataPointSet"):
            thishist = lighthisto.Histo.fromDPS(dps)
            if thishist.histopath in bindefs.keys():
                outhistos.append(thishist.chop(bindefs[thishist.histopath]))
            else:
                outhistos.append(thishist)
        out = open(chopfile, "w")
        out.write('<?xml version="1.0" encoding="ISO-8859-1" ?>\n')
        out.write('<!DOCTYPE aida SYSTEM "http://aida.freehep.org/schemas/3.3/aida.dtd">\n')
        out.write('<aida version="3.3">\n')
        out.write('  <implementation version="1.1" package="FreeHEP"/>\n')
        out.write("\n\n".join([h.asAIDA() for h in sorted(outhistos)]) + "\n")
        out.write("</aida>\n")
        out.close()