[Python-Dev] Sort out formatting differences in decimal and float (original) (raw)

Mark Dickinson dickinsm at gmail.com
Sat Dec 5 13:23:26 CET 2009

On Sat, Dec 5, 2009 at 11:18 AM, Stefan Krah <stefan-usenet at bytereef.org> wrote:

Hi,

I'm in the process of implementing formatting in my C-decimal module. Since testing is quite time consuming, I would appreciate a binding decision on how the following should be formatted:

from decimal import * format(float(1234), '020,g') '0,000,000,000,001,234' format(float(1234), '0=20,g') '0,000,000,000,001,234'

format(Decimal(1234), '020,g') '0,000,000,000,001,234' format(Decimal(1234), '0=20,g') '0000000000000001,234'

I like the Decimal behaviour better, but then I might be a little biased. :-)

I find it odd that, for float formatting, the choice of fill character affects whether commas are inserted:

Python 3.2a0 (py3k:76671, Dec 4 2009, 18:55:54) [GCC 4.2.1 (Apple Inc. build 5646) (dot 1)] on darwin Type "help", "copyright", "credits" or "license" for more information.

format(float(1234), '0=20,g') '0,000,000,000,001,234' format(float(1234), '1=20,g') '1111111111111111,234' format(float(1234), 'X=20,g') 'XXXXXXXXXXXXXXX1,234'

Mark

More information about the Python-Dev mailing list