None seems reasonable. But it does require some conditional checks rather than the simplest min-of-max. Not a bad answer, just something to be explicit about.

On Aug 12, 2016 8:44 PM, "Chris Angelico" <> wrote:
On Sat, Aug 13, 2016 at 1:31 PM, MRAB <> wrote:
> On 2016-08-13 00:48, David Mertz wrote:
>> On Fri, Aug 12, 2016 at 4:25 PM, Victor Stinner
>> < <>> wrote:
> [snip]
>> Also, what is the calling syntax? Are the arguments strictly positional,
>> or do they have keywords? What are those default values if the arguments
>> are not specified for either or both of min_val/max_val?  E.g., is this
>> OK:
>>     clamp(5, min_val=0)
> I would've thought that the obvious default would be None, meaning
> "missing".

Doesn't really matter what the defaults are. That call means "clamp
with a minimum of 0 and no maximum". It's been completely omitted.

But yes, probably it would be min_val=None, max_val=None.

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