[Python-Dev] FixedPoint and % specifiers. (original) (raw)

Guido van Rossum guido@python.org
Wed, 05 Feb 2003 20:00:37 -0500

Displaying FixedPoints:

Python 2.2.1 (#34, Jul 16 2002, 16:25:42) [MSC 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. Alternative ReadLine 1.5 -- Copyright 2001, Chris Gonnerman >>> from fixedpoint import * >>> a = FixedPoint(2.135) >>> print '%d' % (a) 2 >>> print '%4d' % (a) 2 >>> print '%e' % (a) 2.130000e+000 >>> print '%f' % (a) 2.130000 >>> print '%2f' % (a) 2.130000 >>> print '%.2d' % (a) 02 >>> print '%s' % (a) 2.13 >>> a.setprecision(4) >>> print '%s' % (a) 2.1300 I naively expected the %d to produce 2.315

Eh? In C as well as Python, %d means decimal integer. The format specifier to use fixed point notation is %f.

Please don't change this!

--Guido van Rossum (home page: http://www.python.org/~guido/)