On Jul 8, 12:12 am, Ethan Furman <[EMAIL PROTECTED]> wrote:
> 1) Any reason to support the less common operators?
> i.e. <<, >>, &, ^, |
No reason to support any of these for a nonintegral
nonbinary type, as far as I can see.
> 2) What, exactly, does .__pos__() do? An example would help, too.
>
Very little: it implements the unary + operator, which
for most numeric types is a no-op:
>>> +5.0
5.0
So you could safely implement it as:
def __pos__(self):
return self
By the way, have you met the Decimal type? It also
keeps track of significant zeros. For example:
>>> from decimal import Decimal
>>> Decimal('1.95') + Decimal('2.05')
Decimal("4.00")
(Note that the output includes the extra zeros...)
Interestingly, in Decimal the __pos__ operation isn't a no-op:
it rounds a Decimal to the current context, and it also
(mistakenly, in my opinion) changes -0.0 to 0.0:
>>> +Decimal('-0.0')
Decimal("0.0")
>>> +Decimal('123456789123456789123456789123456789')
Decimal("1.234567891234567891234567891E+35")
Mark
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