Python – py2exe and the file system


I have a Python app. It loads config files (and various other files) by
doing stuff such as:

_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
CONFIG_DIR = os.path.join(_path, 'conf')

This works fine. However, when I package the app with py2exe, bad things happen:

  File "proj\config.pyc", line 8, in <module>
WindowsError: [Error 3] The system cannot find the path specified: 'C:\\proj\

Obviously that's an invalid path… What's a more robust way of doing this? I don't
want to specify absolute paths in the program because it could be placed in different
folders. Should I just say "if it says the folder name is '', then go
one more level down to the 'dist' folder"?

Note that I have pretty nested directory hierarchies… for example, I have
a module gui.utils.images, stored in "gui/utils/", and it uses its path
to access "gui/images/ok.png", for example. Right now the py2exe version
would try to access "proj/dist/", or something,
which just won't work.

Best Solution

What do you think about using relative paths for all of the included files? I guess it should be possible to use sys.path.append(".." + os.path.sep + "images") for your example about ok.png, then you could just open("ok.png", "rb"). Using relative paths should fix the issues with the file that's generated by py2exe, at least that's what it does for me.