Hey all - here is a quick note about the various ways to exit python
programs. Consider this a suggestion for a future CodingStyle / New
Developer FAQ, or something.
sys.exit(returncode) really just does:
raise SystemExit(returncode)
So we can use that rather than importing sys just for sys.exit().
Note that SystemExit is a subclass of Exception, so if you're handling
Exception anywhere, you're going to catch SystemExit/sys.exit().
(This is another reason 'except Exception: ..." is a bad idea.)
As pointed out elsewhere, if a thread catches SystemExit the thread will
exit, but not the entire program.
If you really want to exit immediately without dealing with exception
handling or cleanup or threading, there's os._exit(). This should cause
a threaded python program to exit even if called from a thread.
Hope that helps someone,
-w
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