The smallest and largest values of numeric types

Robert Kern robert.kern at
Tue Apr 17 17:12:59 CEST 2007

Lou Pecora wrote:
> In article <QA4Vh.122$Bz6.77 at>, tom at wrote:
>> Hi!
>> How can I determine the smallest and largest values of numeric types 
>> (for example int) possible in my system? I think there exists a function 
>> for this task but I don't know it.
> There is or was a module called "kinds" which was an implementation of 
> PEP  0242.  I have it and it gives the values you are looking for (and 
> more).  But I don't know where I got it.  I think it was once 
> distributed with Macpython on, but I'm not sure.  I've 
> searched for it, but nothing shows up except my own questions about it 
> from many years ago and they have no clues.  

I'm surprised they also didn't turn up my replies to those questions.

> Does anyone know where this package is?  Or what might replace it.  It 
> is very useful.

It used to be distributed with Numeric.

numpy exposes the same information for floating point types with its finfo
class. Nothing particular for ints.

Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco

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