python

#!/usr/bin/python
import random, sys

if len(sys.argv)<2 or len(sys.argv)>3:
	print 'usage: python ' + sys.argv[0]+ ' <filename> [count]'
	sys.exit(-1)

class RRow:
	def __init__(self):
		self.weight = 0
		self.val = ""

class RTable:
	def __init__(self):
		self.rows = []

class RTables:
	def __init__(self):
		self.tabledic = {}

seed = random.SystemRandom().randint(1,sys.maxint)
random.seed(seed)

tables = RTables()
with open(sys.argv[1], 'r') as f:
	origoutput = f.readline().rstrip()
	for line in f:
		liner = line.rstrip()
		if liner == "":
			curtable = ""
		elif curtable == "":
			curtable = liner;
			tables.tabledic[curtable] = RTable()
		else:
			curline = liner;
			row = RRow()
			row.weight = int(liner[0:liner.find(' ')])
			row.val = liner[liner.find(' ')+1:len(liner)]
			tables.tabledic[curtable].rows.append( row )
f.closed

def getrrow( tablename ):
	t = tables.tabledic[tablename]
	totalweight = 0
	for i in t.rows:
		totalweight += i.weight
	rnum = random.SystemRandom().randint(1,totalweight)
	totalweight = 0
	for i in t.rows:
		totalweight += i.weight
		if rnum<=totalweight:
			return i.val;

if len(sys.argv)==3:
	maxgen=int(sys.argv[2])
else:
	maxgen=1

for x in range ( 0, maxgen):
	vars = {}
	output=origoutput
	while output.find('{')>-1:
		bracket1 = output.find('{')
		bracket2 = output.find('}')
		inbrackets = output[bracket1+1:bracket2]
		if inbrackets[0:1] == '%':
			if inbrackets.find('=')>-1:
				varname = inbrackets[1:inbrackets.find('=')]
				vars[varname]=int(inbrackets[inbrackets.find('=')+1:len(inbrackets)])
				output = output[0:bracket1] + output[bracket2+1:len(output)]
			elif inbrackets.find('+')>-1:
				varname = inbrackets[1:inbrackets.find('+')]
				vars[varname]+=int(inbrackets[inbrackets.find('+')+1:len(inbrackets)])
				output = output[0:bracket1] + output[bracket2+1:len(output)]
			elif inbrackets.find('-')>-1:
				varname = inbrackets[1:inbrackets.find('-')]
				vars[varname]-=int(inbrackets[inbrackets.find('-')+1:len(inbrackets)])
				output = output[0:bracket1] + output[bracket2+1:len(output)]
			else:
				output = output[0:bracket1] + str(vars[inbrackets[1:len(inbrackets)]]) + output[bracket2+1:len(output)]
		elif inbrackets[0:2] == '\\n':
			output = output[0:bracket1] + '\n' + output[bracket2+1:len(output)]
		else:
			output = output[0:bracket1] + getrrow(inbrackets) + output[bracket2+1:len(output)]
	print output