cpython list __str__ method for floats

[Bjoern Schliessmann]

[david] wrote:

> Leaving aside the question of why str should return repr,

str doesn't "return" repr. str returns a "nice string
representation" of an object. This "nice string representation" of
a list is the opening square bracket, the repr of its contents
seperated by comma, and the closing square bracket.
<prayer-mill>Here, it *only* makes sense to have a list printed
with the repr of their contents.</prayer-mill>

> 13.300000000000001 is not 'the float in full precision':
> it is an arbitrary translation of the float.

Do you know IEEE 754?
 
> The idea that 13.3 is a 'rounded' value for the number,
> and that 13.300000000000001 is not a 'rounded' value of
> the number, is a common error of intuitive mathematics.

I'm intrigued how /you/'d explain this, please do explain.

> I hope that when you say that this is a FAQ, you don't
> mean that the community has solidified on this naive
> interpretation :~)

No, I mean that your complaint is not at all new. Reading the
archives you could have learned a lot about this topic.

Regards,


Björn

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