I'm trying to use lockfiles from within python and can't figure out
the equivalent of the C call

    open("/tmp/foo", O_CREAT | O_EXCL | O_RDWR);

It looks like none of the file opening methods give me this feature,
though I'm very new to Python and may easily be overlooking something
obvious.

So, does anyone know how to do this, or do I have write an module in
C?

Thanks.

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