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#!/usr/bin/env python3
#
# Copyright (c) 2016 Weitian LI <liweitianux@live.com>
# MIT license
"""
Retrieve the Galactic SNRs catalog data by parsing the web by /D. A. Green/:
http://www.mrao.cam.ac.uk/surveys/snrs/
http://www.mrao.cam.ac.uk/surveys/snrs/snrs.data.html
and save the data in CSV format.
"""
import os
import sys
import argparse
import logging
import csv
from fg21sim.configs import configs
from fg21sim.utils import setup_logging
from fg21sim.data import retrieve_snr_data_green, SNRDataGreen
# Web page to the Galactic SNRs catalog summary
SNR_DATA_URL = "http://www.mrao.cam.ac.uk/surveys/snrs/snrs.data.html"
def main():
outfile_default = "GalacticSNRs_Green2014.csv"
parser = argparse.ArgumentParser(
description="Retrieve Galactic SNRs catalog data")
parser.add_argument("outfile", nargs="?", default=outfile_default,
help="output CSV file to save the catalog data " +
"(default: %s)" % outfile_default)
parser.add_argument("-U", "--url", default=SNR_DATA_URL,
help="URL to Green's SNRs catalog summary page " +
"or a local HTML file (default: %s)" % SNR_DATA_URL)
parser.add_argument("-C", "--clobber", action="store_true",
help="overwrite the existing output file")
parser.add_argument("-l", "--log", dest="loglevel", default=None,
choices=["DEBUG", "INFO", "WARNING",
"ERROR", "CRITICAL"],
help="set the log level")
parser.add_argument("-L", "--logfile", default=None,
help="filename where to save the log messages")
parser.add_argument("-Q", "--quiet", action="store_true",
help="be quiet so do not log messages to screen")
args = parser.parse_args()
if args.quiet:
log_stream = ""
else:
log_stream = None
tool = os.path.basename(sys.argv[0])
setup_logging(dict_config=configs.logging,
level=args.loglevel,
stream=log_stream,
logfile=args.logfile)
logger = logging.getLogger(tool)
logger.info("COMMAND: {0}".format(" ".join(sys.argv)))
if os.path.exists(args.outfile) and (not args.clobber):
raise IOError("output file already exists: %s" % args.outfile)
snrdata_str = retrieve_snr_data_green(args.url)
snrdata = SNRDataGreen(snrdata_str[0])
header = list(snrdata.data_flat.keys())
with open(args.outfile, "w") as csvfile:
csvwriter = csv.writer(csvfile)
csvwriter.writerow(header)
for i, dstr in enumerate(snrdata_str):
logger.info("Parse data string #{0:03d}: '{1}'".format(i+1, dstr))
snrdata = SNRDataGreen(dstr)
values = list(snrdata.data_flat.values())
csvwriter.writerow(values)
logger.info("Galactic SNRs catalog data write to: %s" % args.outfile)
if __name__ == "__main__":
main()
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