os.chdir() considered harmful

[Rob Hooft]

 DEW> When I have to use os.chdir() I like to make sure that the old path is
 DEW> restored when I am done.  So I use a class like this:

 DEW> import os

 DEW> class ChangePath:
 DEW>   def __init__(self, newPath):
 DEW>     self.savedPath = os.getcwd()
 DEW>     os.chdir(newPath)

 DEW>   def __del__(self):
 DEW>     os.chdir(self.savedPath)

You better make sure that only one of these is active at any time, or
that they get destroyed in reverse order of creation!

Rob

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