Raymond Hettinger <raymond.hettin...@gmail.com> added the comment:

I would like to see this posted as a recipe before being put in the standard 
library.  It needs a chance to mature and to demonstrate that people will want 
to use it.

FWIW, the example is problematic in a couple of ways.  The registration of 
shutil.rmtree(tmpdir) will run *before* mngr register is called.  

Also, it doesn't take advantage of any of the with-statement features.  It 
doesn't show any advantage over a standard try/finally which is arguably 
cleaner:

    tmpdir = tempfile.mkdtemp()
    try:
        # do stuff with tmpdir
    finally:
        shutil.rmtree()

Also, I suspect that the CleanupManager would be an error-prone construct 
because the registration occurs somewhere after the with-statement is set-up, 
possibly resulting in errors if there is an early, pre-registration failure.

----------
nosy: +rhettinger

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<http://bugs.python.org/issue13585>
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