#! /usr/bin/python

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__author__="bjschuma"
__date__ ="$Mar 13, 2010 5:27:12 PM$"

import os
import sys
import re


def expand(path):
	return os.path.expanduser(path)


def join(a,b):
	return os.path.join(a,b)


def exists(path):
	return os.path.exists( expand(path) )


def isdir(path):
	if exists(path) == True:
		return os.path.isdir( expand(path) )
	return False


def isfile(path):
	if exists(path) == True:
		return os.path.isfile(path)
	return False
	

def ls(path):
	try:
		return os.listdir( expand(path) )
	except:
		return None


def rm(path):
	if isfile(path):
		os.remove(path)


def mkdir(path):
	if exists(path) == False:
		os.mkdir(path)


def addPyPath(path):
	mods = []
	if exists(path) == True:
		sys.path.append(path)
		for file in ls(path):
			if re.match("(.*?)\.py(?!c)",file):
				mods += [file.rsplit(".py",1)[0]]
	return mods