Jeffrey Kintscher <[email protected]> added the comment:
Yes, onerror allows you to delete an undeletable item. But, in the case of a
mount point, the contents of the mounted filesystem get deleted *before* the
mount point triggers onerror. This is the case described in issue #36422.
The behavior provided by onitem allows you to provide a callback that can check
for specific paths that may require special handling. This is especially
useful if the onitem callback is also added to tempfile.TemporaryDirectory().
My PR handles a missing onitem argument the same way onerror is handled by
providing a do-nothing stub function:
if onitem is None:
def onitem(*args):
pass
I don't know enough about CPython internals to tell the performance differences
between such a stub function and wrapping each call to onitem in an "if" block.
----------
versions: +Python 3.7, Python 3.8
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