Mailman 3 %-formatting with Decimals - Python-ideas

11 Mar 2014


      During recent discussions I came across something unfortunate with
formatting Decimals.

Formatting with .format works as I would want:
...
...
...
from decimal import Decimal as D
'{:1.0e}'.format(D('1.123e+1000'))
'1e+1000'
'{:1.0e}'.format(D('1.123e-1000'))
'1e-1000'
'{:.50f}'.format(D('1.1'))
'1.10000000000000000000000000000000000000000000000000'
But %-formatting coerces to float:
...
...
...
'%1.0e' % D('1.123e-1000')
'0e+00'
'%1.0e' % D('1.123e+1000')
'inf'
'%.50f' % D('1.1')
'1.10000000000000008881784197001252323389053344726562'
Am I doing this wrong? Is this just a limitation of the old-style %
formatting or something that could possibly be improved?


Oscar

%-formatting with Decimals

Oscar Benjamin

tags

participants (8)