[issue13177] Avoid chained exceptions in lru_cache

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

Sorry, I'm not going to introduce a possible race condition because you find try/except to be less elegant than an if-contains test.  Also, I want to keep the current behavior of calling hash only once.  Your original complaint is valid though, so I'll go ahead and move the user_function call outside the exception block so as to avoid unnecessary exception chaining.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13177>
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