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

Ethan Furman ethan at stoneleaf.us
Wed Apr 4 20:06:50 CEST 2012

Georg Brandl wrote:
> Am 04.04.2012 18:18, schrieb Ethan Furman:
>> Lennart Regebro wrote:
>>> On Tue, Apr 3, 2012 at 18:07, Ethan Furman <ethan at stoneleaf.us> wrote:
>>>> What's unclear about returning None if no clocks match?
>>> Nothing, but having to check error values on return functions are not
>>> what you typically do in Python. Usually, Python functions that fail
>>> raise an error. Please don't force Python users to write pseudo-C code
>>> in Python.
>> You mean like the dict.get() function?
>> --> repr({}.get('missing'))
>> 'None'
> Strawman: this is not a failure.

Also not a very good example -- if 'missing' was there with a value of 
None the two situations could not be distinguished with the one call.

At any rate, the point is that there is nothing inherently wrong nor 
unPythonic about a function returning None instead of raising an exception.


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