clever exit of nested loops

Gregory Ewing greg.ewing at canterbury.ac.nz
Thu Sep 27 19:43:21 EDT 2018

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Neal Becker wrote:
> but it does violate the principle "Exceptions should 
> be used for exceptional conditions).

Python doesn't really go in for that philosophy.
Exceptions are often used for flow control, e.g.
StopIteration.
-- 
Greg

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