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Groups > comp.lang.python > #30961
| References | <91ff9b33-c212-4be0-8ed0-1f6b16f56865@googlegroups.com> <5072E7CC.2070405@davea.name> |
|---|---|
| Date | 2012-10-09 02:00 +1100 |
| Subject | Re: To get the accurate value of 1 - 0.999999999999999 ,how to implement the python algorithm ？ |
| From | Chris Angelico <rosuav@gmail.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.1953.1349708407.27098.python-list@python.org> (permalink) |
On Tue, Oct 9, 2012 at 1:48 AM, Dave Angel <d@davea.name> wrote: > import decimal > a = decimal.Decimal(4.3) > print(a) > > 5.0999999999999996447286321199499070644378662109375 Ah, the delights of copy-paste :) > The Decimal class has the disadvantage that it's tons slower on any modern machine I know of... Isn't it true, though, that Python 3.3 has a completely new implementation of decimal that largely removes this disadvantage? ChrisA
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To get the accurate value of 1 - 0.999999999999999 ,how to implement the python algorithm ？ iMath <redstone-cold@163.com> - 2012-10-08 07:07 -0700
Re: To get the accurate value of 1 - 0.999999999999999 ,how to implement the python algorithm ？ Dave Angel <d@davea.name> - 2012-10-08 10:48 -0400
Re: To get the accurate value of 1 - 0.999999999999999 ,how to implement the python algorithm ？ Chris Angelico <rosuav@gmail.com> - 2012-10-09 02:00 +1100
Re: To get the accurate value of 1 - 0.999999999999999 ,how to implement the python algorithm � Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-09 11:39 +0000
Re: To get the accurate value of 1 - 0.999999999999999 ,how to implement the python algorithm ？ Dave Angel <d@davea.name> - 2012-10-08 11:13 -0400
Re: To get the accurate value of 1 - 0.999999999999999 ,how to implement the python algorithm ？ Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-10-08 16:44 +0200
Re: To get the accurate value of 1 - 0.999999999999999 ,how to implement the python algorithm ？ Chris Angelico <rosuav@gmail.com> - 2012-10-09 02:19 +1100
Re: To get the accurate value of 1 - 0.999999999999999 ,how to implement the python algorithm ？ Terry Reedy <tjreedy@udel.edu> - 2012-10-08 21:45 -0400
Re: To get the accurate value of 1 - 0.999999999999999 ,how to implement the python algorithm ？ Dave Angel <d@davea.name> - 2012-10-08 22:20 -0400
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