Re: [Python-Dev] an alternative to embedding policy in PEP 418 (was: PEP 418: Add monotonic clock)

2012年4月04日 13:36:47 -0700

Oleg Broytman wrote:
On Wed, Apr 04, 2012 at 11:03:02AM -0700, Ethan Furman wrote:
Oleg Broytman wrote:
 . Pythonic equivalent of "get_clock(THIS) or get_clok(THAT)" is
for flag in (THIS, THAT):
 try:
 clock = get_clock(flag)
 except:
 pass
 else:
 break
else:
 raise ValueError('Cannot get clock, tried THIS and THAT')
Wow -- you'd rather write nine lines of code instead of three?
clock = get_clock(THIS) or get_clock(THAT)
if clock is None:
 raise ValueError('Cannot get clock, tried THIS and THAT')
 Yes - to force people to write the last two lines. Without forcing
most programmers will skip them.
Forced? I do not use Python to be forced to use one style of programming over another. And it's not like returning None will allow some clock calls to work but not others -- as soon as they try to use it, it will raise an exception.
~Ethan~
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