[Python-ideas] float('∞')=float('inf')

[Serhiy Storchaka]

12.07.13 20:18, Joshua Landau написав(ла):
> On 12 July 2013 18:12, Serhiy Storchaka <storchaka at gmail.com> wrote:
>> 12.07.13 18:50, Joshua Landau написав(ла):
>>> On 12 July 2013 16:26, Serhiy Storchaka <storchaka at gmail.com> wrote:
>>>> 12.07.13 17:10, Joshua Landau написав(ла):
>>>>> int and float are obviously meant to handle abstract inputs (not
>>>>> expressions) and unicode infinity is an extension of this. Your
>>>>> "analogies" are inapt.
>>>>
>>>> Why you think ½ (this is only one symbol!) and 3.(142857) (this is a
>>>> decimal
>>>> notation of the 22/7 fraction) are expressions, but ∞ or even -1 are not?
>>>
>>> For the same reason that 0.5 and [0,
>>> 1, 2, 3, 4] are literals but 1/2 and range(5) are not.
>>
>> ∞ is not a literal.
>
> So? float("[1, 2, 3, 4]") isn't valid -- I never claimed there was 1:1
> mapping between literals and things that float should except. I said
> that float shouldn't parse expressions.

I agree. But how is it related to ½ and 3.(142857)?