Confused compare function :)
python at mrabarnett.plus.com
Sat Dec 8 18:50:46 CET 2012
On 2012-12-08 07:17, Chris Angelico wrote:
> On Sat, Dec 8, 2012 at 6:01 PM, Terry Reedy <tjreedy at udel.edu> wrote:
>> Unfortunately, catching exceptions may be and often is as slow as the
>> redundant check and even multiple redundant checks.
> It depends on how often you're going to catch and how often just flow
> through. In Python, as in most other modern languages, exceptions only
> cost you when they get thrown. The extra check, though, costs you in
> the normal case.
That's where the .get method comes in handy:
MISSING = object()
value = my_dict.get(key, MISSING)
if value is not MISSING:
It could be faster if the dict often doesn't contain the key.
More information about the Python-list