Issue 1590891: random.randrange don't return correct value for big number (original) (raw)

Issue1590891

Created on 2006-11-05 16:54 by mft, last changed 2022-04-11 14:56 by admin. This issue is now closed.

Messages (4)
msg30457 - (view)	Author: MATSUI Tetsushi (mft)	Date: 2006-11-05 16:54
Python 2.4.3 (#1, Oct 3 2006, 00:36:06) [GCC 4.1.1 (Gentoo 4.1.1-r1)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import random >>> random.randrange(1000000000000, -100000000000000000000, -200) 267471051174796896L Obviously, the result is not in the specified range; 1000000000000 < 267471051174796896, -100000000000000000000 < 267471051174796896 and (267471051174796896 - 1000000000000) % (-200) != 0. I'm using 2.3.5 and 2.4.3, and their behaviors are identical. I haven't checked about 2.5.
msg30458 - (view)	Author: Josiah Carlson (josiahcarlson) *	Date: 2006-11-08 16:45
Logged In: YES user_id=341410 2.5 has the same behavior. One workaround (until it gets fixed) is to do the following... def myrandrange(start, stop, step): return start + random.randrange((stop-start)//step)*step random.randrange should change to do some variant of the above, given sane start, stop, step arguments.
msg30459 - (view)	Author: Armin Rigo (arigo) *	Date: 2006-11-08 22:22
Logged In: YES user_id=4771 Oups. If the interval is very large, the step is ignored. Patch attached...
msg30460 - (view)	Author: Raymond Hettinger (rhettinger) *	Date: 2006-12-20 06:43
Thanks for the report. Fixed in revision 53099.