grestart
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	#!/usr/bin/env python

	'''
	restart a gadget simulation
	'''


	import sys
	import os
	import string

	try:
	from optparse import OptionParser
	except ImportError:
	from optik import OptionParser




	def parse_options():

	usage = "usage: %prog [options] file"
	parser = OptionParser(usage=usage)

	parser.add_option("-p",
	action="store",
	dest="params",
	type="string",
	default = 'params',
	help="gadget parameter file",
	metavar=" FILE")

	parser.add_option("-r",
	action="store",
	dest="runfile",
	type="string",
	default = 'run',
	help="run file",
	metavar=" FILE")

	(options, args) = parser.parse_args()

	if len(args) == 0:
	print "you must specify a filename"
	sys.exit(0)

	file = args[0]

	return file,options


	######################
	# MAIN
	######################


	# get options
	file,options = parse_options()
	params = options.params
	runfile = options.runfile


	# open params file
	f = open(params,'r')
	lines = f.readlines()
	f.close()

	# rewrite params file
	f = open('params.restart','w')
	for line in lines:
	wds = string.split(line)
	if len(wds) != 0:
	if wds[0] == "InitCondFile":
	txt = os.path.join(os.path.dirname(wds[1]),file)
	txt = string.join(["InitCondFile",'\t\t ',txt,'\n'])
	f.write(txt)

	else:
	f.write(line)

	else:
	f.write(line)

	f.close()

	# open run file
	f = open(runfile,'r')
	line = f.readline()
	f.close()


	line = string.split(line)
	line[-1] = 'params.restart'
	line.append('2')
	#line.append('&')
	line = string.join(line)

	os.system(line)