python append all subdirectories to sys.path

This is my pather class. It appends/prepends the application subdirectories to sys.path

#!/usr/bin env python
#
# -*- coding: UTF-8 -*-
#
# PyNutButter BETA Version 0.1.0.1
#
# Copyright 2009 - Infinity and Beyond by Alex Goretoy, All Rights Reserved.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted,
# provided that the above copyright notice appear in all copies and that
# both that copyright notice and this permission notice appear in
# supporting documentation, and that the name of Vinay Sajip
# not be used in advertising or publicity pertaining to distribution
# of the software without specific, written prior permission.
# VINAY SAJIP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
# VINAY SAJIP BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
# IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
# SEE ALSO LICENSE FILE IN PROJECT ROOT DIRECTORY
#
__author__ = "Aleksandr Ilyich Goretoy "
__status__ = "beta" #production
__version__ = "0.1.0.1"
__date__ = "14 March 2009"



import os
import sys
class _pather(object):
def __init__(self,cwd="",send="append",depth=0,height=1):
"""
pwd - directory to get listing from
send - append or prepend to sys.path
depth - 0 is current dir, 1 is next level directory
height - root, dirs, files
"""
self.path=[]
self._path=[]
self.send=send
if cwd is not "":
self.set_paths(cwd,send,depth,height)

return None
def append(self,path):
for i in range(len(sys.path)):
try:
if str(path) == str(sys.path[i]):
if sys.path.index(path)>0:
del sys.path[i]
except(ValueError,IndexError):
pass
self._path=self.path
self.path=path
return sys.path.append(str(self.path))
def prepend(self,path):
for i in range(len(sys.path)):
if str(path) == str(sys.path[i]):
del sys.path[i]
self._path=self.path
self.path=path
return sys.path.prepend(str(self.path))

def set_path(self,value,prepend="",append=""):
self.pathstr="%s/%s/%s"%(prepend,value,append)
if self.send == "append":
self.append(self.pathstr)
else:
self.prepend(self.pathstr)

def set_paths(self,pwd,send="append",depth=0,height=1):
self.send=send
self.pathlist= list( ( (root,dirs,files) for root, dirs,files in os.walk(pwd) ) )[depth][height]
if self.send == "append":
list((self.append("%s/%s"%(pwd,x)) for x in self.pathlist if not x.startswith(".")))
else:
list((self.prepend("%s/%s"%(pwd,x)) for x in self.pathlist if not x.startswith(".")))

python append application working directories subdirectory to sys.path

This is a little script to show how to append the application working directories subdirectories when os.environ['PWD'] _not_ in application directory

#!/usr/bin/env python
import os,sys
print __file__
print os.environ["PWD"]
s=os.environ["PWD"]+"/"+os.path.dirname(__file__)
sys.path.append(s+"/python_stdout_colors")
print sys.path

doing only os.environ['PWD'], os.get_cwd() or os.path.dirname is _not_ enough and will cause errors in your application if a user opens it in different directory than where the script is