_SafeTemporaryDirectory(suffix=None, prefix=None, dir=None)
This will not raise an exception if the temporary directory goes away before it's supposed to be deleted. Specifically, what is deleted will be the directory name produced; if no such directory exists, no exception will be raised.
It would be safer to delete it only if it's really the same directory - checked by file descriptor - and if it's still called the same thing. But that opens a platform-specific can of worms.
It would also be more robust to use ExitStack and TemporaryDirectory, which is more aggressive about removing readonly things.
Temporary directory context manager
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Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)
SVG is more flexible but power hungry; and does not scale well to 50 + nodes.
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