Python-3 implementation of the tree linux command

tree

#! /usr/bin/env python3

__author__ = "Prahlad Yeri"
__license__ = "MIT"
__version__ = "0.0.1"

import os, sys

def print_tree(dirname, pref = ""):
	for item in os.listdir(dirname):
		if item.startswith('.'): continue
		print(pref + item)
		if os.path.isdir(os.path.join(dirname, item)):
			print_tree(os.path.join(dirname, item), " "*len(pref) + "+" + ("-"*5))

def main():
	if len(sys.argv) == 1:
		dirname = "."
	else:
		dirname = sys.argv[1]
	print_tree(dirname)

if __name__ == "__main__":
	main()