Python: Shell Script With Options

parseoptions.py

import sys
import time
import math
import optparse



__version__ = "0.1"
__copyright__ = "CopyRight (C) 2013 by Michele Pasin"
__license__ = "MIT"
__author__ = "Michele Pasin"
__author_email__ = "michele dot pasin at gmail dot com"

USAGE = "%prog [options] <arg>"
VERSION = "%prog v" + __version__

AGENT = "%s/%s" % (__name__, __version__)





def parse_options():
  """parse_options() -> opts, args

    Parse any command-line options given returning both
	the parsed options and arguments.
	"""

	parser = optparse.OptionParser(usage=USAGE, version=VERSION)

	# JUST SOME EXAMPLES.... 

	parser.add_option("-d", "--depth",
			action="store", type="int", default=1, dest="depth",
			help="Maximum depth to traverse - by default is 1")

	parser.add_option("-u", "--urlpattern",
			action="store", type="string", default="", dest="urlpattern",
			help="Extract links that match the url pattern provided only - by default no pattern is matched.")

	parser.add_option("-q", "--quiet",
			action="store_true", default=False, dest="quiet",
			help="Enable quiet mode")

	opts, args = parser.parse_args()

	if len(args) < 1:
		parser.print_help()
		raise SystemExit, 1

	return opts, args





def main():
	# get parameters
	opts, args = parse_options()
	url = args[0]
	depth = opts.depth
	urlpattern = opts.urlpattern
	quiet = opts.quiet

	sTime = time.time()

	print "Started ... %s (Max Depth: %d; Matching Pattern Url: \"%s\"; Quiet: \"%s\")" % (url, depth, urlpattern, quiet)
	obj = SOMEOBJECT(url, depth, urlpattern, quiet)
	obj.doSomething()

	# print results....

	

	# print some stats....

	eTime = time.time()
	tTime = eTime - sTime

	print "Found:	   %d" % len(obj.allurls)
	print "Followed: %d" % obj.followed
	print "Stats:	   (%d/s after %0.2fs)" % (
			  int(math.ceil(float(len(obj.allurls)) / tTime)), tTime)

if __name__ == "__main__":
	main()