> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:python-dev- > [EMAIL PROTECTED] On Behalf Of Phillip J. Eby > Sent: Tuesday, May 17, 2005 6:06 PM > To: Michael Chermside; [EMAIL PROTECTED] > Cc: python-dev@python.org > Subject: Re: [Python-Dev] Example for PEP 343 > > At 02:42 PM 5/17/2005 -0700, Michael Chermside wrote: > > ># ===== SAMPLE #1: increasing precision during a sub-calculation ===== > > > >import decimal > > > >@do_template > >def with_extra_precision(places=2): > > "Performs nested computation with extra digits of precision." > > decimal.getcontext().prec += 2 > > yield None > > decimal.getcontext().prec -= 2 > > Won't this do the wrong thing if something within the block alters the > precision?
Right. It should save, alter, and then restore: oldprec = decimal.getcontext().prec decimal.getcontext().prec += 2 yield None decimal.getcontext().prec = oldprec Raymond Hettinger _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
