How secure are temp files created via tempfile.TemporaryFile()?

python at python at
Thu Feb 18 19:54:27 CET 2010

I'm doing a code review of an application that occassionally
writes blocks of secure data to temp files created with
tempfile.TemporaryFile( delete=True ).

How secure are temp files created via tempfile.TemporaryFile(
delete=True )?

Are there OS specific nuances I should be concerned about
regarding use of this function on Windows (XP or higher) or

Thank you,
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