[Python-Dev] why do we allow this syntax? (original) (raw)
Oscar Benjamin oscar.j.benjamin at gmail.com
Fri Feb 8 17:17:55 CET 2013
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On 8 February 2013 16:10, Benjamin Peterson <benjamin at python.org> wrote:
2013/2/8 Chris Withers <chris at simplistix.co.uk>:
On 08/02/2013 15:42, Benjamin Peterson wrote:
2013/2/8 Chris Withers<chris at simplistix.co.uk>:
Hi All, Just had a bit of an embarrassing incident in some code where I did: sometotal =+ somevalue
That's just a strange way of expressing sometotal = +somevalue Indeed, but why should this be possible? When could it do something useful? :-) + is a normal overridable operator.
Decimal.pos uses it to return a Decimal instance that has the default precision of the current Decimal context:
from decimal import Decimal d = Decimal('0.33333333333333333333333333333333333333') d Decimal('0.33333333333333333333333333333333333333') +d Decimal('0.3333333333333333333333333333')
Oscar
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