Sublime Text 2 plugin to parse lua on the fly

ParseLua.py

import sublime
import sublime_plugin
import re
from subprocess import Popen, PIPE

class ExampleCommand(sublime_plugin.EventListener):
	
	TIMEOUT_MS = 200

	def __init__(self):
		self.pending = 0

	def on_modified(self, view):
		filename = view.file_name()
		if not filename or not filename.endswith('.lua'):
			return
		self.pending = self.pending + 1
		sublime.set_timeout(lambda: self.parse(view), self.TIMEOUT_MS)

	def parse(self, view):		
		# Don't bother parsing if there's another parse command pending
		self.pending = self.pending - 1
		if self.pending > 0:
			return
		# Run luac with the parse option
		p = Popen('luac -p -', stdin=PIPE, stderr=PIPE, shell=True)
		text = view.substr(sublime.Region(0, view.size()))
		errors = p.communicate(text)[1]
		result = p.wait()
		# Clear out any old region markers
		view.erase_regions('lua')
		# Nothing to do if it parsed successfully
		if result == 0:
			return			
		# Add regions and place the error message in the status bar
		sublime.status_message(errors)
		pattern = re.compile(r':([0-9]+):')
		regions = [view.full_line(view.text_point(int(match) - 1, 0)) for match in pattern.findall(errors)]
		view.add_regions('lua', regions, 'invalid', 'DOT', sublime.HIDDEN)