[openstack-dev] [Review] Use of exception for non-exceptional cases
nachi at ntti3.com
Wed Jul 10 18:56:47 UTC 2013
Thank you for your answer.
> I can't get past this specific example... how often do you find yourself
> needing to do this, exactly? Generally when you use a list you either FIFO /
> LIFO or iterate through the whole thing in some fashion.
> I'd be tempted to write it as dict(enumerate(my_list)).get(3,
> 'default_value') just because you're treating it like a mapping anyway.
I see this example on the one review which is parsing configuration.
so the config looks like
>> This can be also written as,
>> list_a if len(list_a) > 3 else 'default_value'
>> "ask for forgiveness, not permission" is one of way in python,
>> however, on the other hand, google python code style guide says,
>> Minimize the amount of code in a try/except block. The larger the body
>> of the try, the more likely that an exception will be raised by a line
>> of code that you didn't expect to raise an exception. In those cases,
>> the try/except block hides a real error.
> +1 for this, but it's not really intended to provide an answer your question
> of approach.
OK, I got it.
>> Personally, I prefer not to use exception for such cases.
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