gstlal_asd_txt_from_psd_xml

#!/usr/bin/env python
#
# Copyright (C) 2018  Kipp Cannon
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.


#
# =============================================================================
#
#                                   Preamble
#
# =============================================================================
#


from optparse import OptionParser
import sys


from glue.ligolw import utils as ligolw_utils
from lal import series as lalseries


#
# =============================================================================
#
#                                 Command Line
#
# =============================================================================
#


def parse_command_line():
   parser = OptionParser(
       description = ""
   )
   parser.add_option("--prefix", metavar = "string", default = "psd_", help = "Prepend output files with this string (default = \"psd_\").")
   parser.add_option("-v", "--verbose", action = "store_true", help = "Be verbose (optional).")

   options, filenames = parser.parse_args()

   if len(filenames) != 1:
       raise ValueError("only file PSD file may be given")

   return options, filenames


#
# =============================================================================
#
#                                     Main
#
# =============================================================================
#


#
# parse command line
#


options, filenames = parse_command_line()


#
# load the PSD file iterate over instruments, writing ASD to ascii file
#


for filename in filenames:
   for instrument, psd in lalseries.read_psd_xmldoc(ligolw_utils.load_filename(filename, verbose = options.verbose, contenthandler = lalseries.PSDContentHandler)).items():
       filename = "%s%s.txt" % (options.prefix, instrument)
       with open(filename, "w") as f:
           if options.verbose:
               print >>sys.stderr, "writing \"%s\" ..." % filename
           for i, x in enumerate(psd.data.data):
               print >>f, "%.16g %.16g" % (psd.f0 + i * psd.deltaF, x**.5)