Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #90700
| From | Mark Lawrence <breamoreboy@yahoo.co.uk> |
|---|---|
| Subject | Re: Python: How to find out values of all feasible x under constraints. |
| Date | 2015-05-16 01:16 +0100 |
| References | <12da2c70-fd4e-430b-83d2-fad4ac1e3f8f@googlegroups.com> <mj4p69$je7$1@ger.gmane.org> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.52.1431735384.17265.python-list@python.org> (permalink) |
On 15/05/2015 13:35, Mark Lawrence wrote: > On 15/05/2015 04:58, Xiang Zhang wrote: >> Dear all, >> >> I am writing a code using Python now. >> >> I want to know how to find out values of all feasible x under >> constraints. >> >> x = [x_1, x_2, x_3,..., x_10] >> >> >> constraints: >> x_i = 0,1,2,3 or 4, where i=1,2,....10 >> x_1 + x_2 + x_3 +...+x_10 <= 15 >> >> How to find out all the feasible solutions x (domain of x) using >> python, like [0,0,0,0,0,0,0,0,0,0], [1,1,1,1,1,1,1,1,1,1] etc ? What >> should be the code? >> >> Any hint or help would be highly appreciated! >> >> Sincerely, >> >> Xiang Zhang >> > > There are several constraint libraries on pypi if you don't want to roll > your own. See for example > https://pypi.python.org/pypi/python-constraint/1.2 > Forgot to mention this http://numberjack.ucc.ie/ Maybe of general interest see also http://www.csplib.org/ http://www.hakank.org/constraint_programming_blog/ -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence
Back to comp.lang.python | Previous | Next — Previous in thread | Find similar | Unroll thread
Python: How to find out values of all feasible x under constraints. Xiang Zhang <zhangxiangsunny@gmail.com> - 2015-05-14 20:58 -0700 Re: Python: How to find out values of all feasible x under constraints. Peter Otten <__peter__@web.de> - 2015-05-15 09:47 +0200 Re: Python: How to find out values of all feasible x under constraints. Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-05-15 13:35 +0100 Re: Python: How to find out values of all feasible x under constraints. Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-05-16 01:16 +0100
csiph-web