Added tool to look up iso639-3 langcodes

iso639_langcodes.py

@@ -0,0 +1,25 @@
+#!/usr/bin/python2
+
+# Looks up all three letter iso 639-3 langcodes either given as argument or
+# in all installed locales
+
+from urllib2 import urlopen
+from sys import argv
+from os import listdir, path
+
+langcodes = argv[1:] or [dir for dir in listdir('/usr/share/locale') if len(dir) == 3]
+
+if not langcodes:
+	print('Nothing to do...')
+	exit(0)
+
+response = urlopen('http://www-01.sil.org/iso639-3/iso-639-3_Name_Index.tab')
+rows = (line.split('\t') for line in response.read().splitlines())
+langdict = {cell[0] : cell[1] for cell in rows}
+
+for langcode in langcodes:
+	langname = langdict[langcode]
+	if not langname:
+		print('Unknown code '+langcode)
+	else:
+		print("'{}': '{}',".format(langcode, langname))