[Python-Dev] functions vs methods (was Re: trunc())

[Ron Adam]

Raymond Hettinger wrote:
> Please ignore my last email.  The idea for combining trunc, ceil,
> floor, etc was probably just a distractor.

I was going to suggest the same round(n, mode="round_method_of choice") to 
both round and int(), where int is more forgiving for input.  But wasn't 
convinced.


> [GvR]
>> One thing I'm beginning to feel more and more strongly about
>> is that round, trunc, ceil and floor all belong in the same
>>  category, and either should all be builtins or should all
>> be in math.
> 
> +1 for all four going into the math module.

Works for me.

It seems simple enough to just do ...

    from math import round_even as round


This gives me the specific rounding behavior I want without a lot of noise.


Ron




>> I should also admit that the 2-arg version of round() was
>> borrowed from ABC, but the use case for it there doesn't map
>> to Python: in ABC it's the only tool you have for floating point
>> formatting on output, while in Python the same thing would
>> typically be done with "%.2f" % x rather than round(x, 2).
> 
> +1 for deprecating the second argument to round().
> 
> 
> Raymond
> _______________________________________________
> Python-Dev mailing list
> Python-Dev at python.org
> http://mail.python.org/mailman/listinfo/python-dev
> Unsubscribe: http://mail.python.org/mailman/options/python-dev/rrr%40ronadam.com
>