Combine freetalk history files

history_combine.py

#!/usr/bin/python2
#usage: scriptname file1 file2 ...
import sys
import re
def toarray(a):
	entrystart = re.compile('[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2} \[[^\s]*@[^\s]*\]')
	a2 = []
	for line in a:
		match = entrystart.match(line)
		if match is not None:
			a2.append(line)
		else :
			s = a2.pop()
			s += line
			a2.append(s)
	return a2

def filetoarray(s):
	f = open(s,'r')
	return toarray(f.readlines())

a = []	
a = map(filetoarray, sys.argv[1:])
a = [item for sublist in a for item in sublist]
a = list(set(a))
a.sort()
map(sys.stdout.write, a)