Math errors in python

[Bengt Richter]

On 19 Sep 2004 15:24:31 -0700, danb_83 at yahoo.com (Dan Bishop) wrote:
[...]
>There are, of course, reasonably accurate rational approximations of
>pi.  For example, 355/113 (accurate to 6 decimal places), 312689/99532
>(9 decimal places), or 3126535/995207 (11 decimal places).  Also, the
>IEEE 754 double-precision representation of pi is equal to the
>rational number 4503599627370496/281474976710656.
      >>> divmod(4503599627370496,281474976710656)
      (16L, 0L)

a little glitch somewhere ? ;-)

Others are nice though, but the last one shows up same way:

 >>> print '%s\n%s' %(ED('312689/99532').round(11), ED(math.pi,11))
 ED('3.14159265362')
 ED('3.14159265359')
 >>> print '%s\n%s' %(ED('3126535/995207').round(13), ED(math.pi,13))
 ED('3.1415926535887')
 ED('3.1415926535898')
 >>> print '%s\n%s' %(ED('4503599627370496/281474976710656'), ED(math.pi,'all'))
 ED('16')
 ED('3.141592653589793115997963468544185161590576171875')

Regards,
Bengt Richter