[Python-ideas] Retrying EAFP without DRY (original) (raw)

Steven D'Aprano steve at pearwood.info
Sat Jan 21 09:57:16 CET 2012

Chris Rebert wrote:

On Fri, Jan 20, 2012 at 11:47 PM, Steven D'Aprano <steve at pearwood.info> wrote:

I just wish that break and continue could be written outside of a loop, so you can factor out common code: [...] Easily accomplished: def dothething(x): try: dosomething(x) except SpamError: fixup(x) return False else: return True def tryrepeatedly(n, func, arg): for in range(n): if func(arg): break else: raise HamError('tried %d times, giving up now" % n) tryrepeatedly(5, dothething, y)

Not so easily accomplished if you need the return result from do_the_thing. Naturally you can always return a tuple

(result_I_actually_want, code_to_break_or_continue)

but that's not exactly elegant.

-- Steven

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