Thank you for your answer. The thing is that I have some old sage's code 
that uses this patch and seem useless in the recent version of sage. 
Your idea is not bad, about adding this function in the source code and 
patch sage,  but not easy for me do it. Maybe I try it.
Some "simple" things in sage, sometimes are too complicated for simple 
users.
Costas


On Saturday, March 21, 2015 at 6:02:39 PM UTC+2, John Cremona wrote:
>
> The patch on that ticket was written in 2011 so there is little hope 
> that it will apply to the most recent version of Sage.  Also, it is 
> old enough that it predates Sage's current git-based revision system 
> so would need to be applied manually anyway. 
>
> The patch on that ticket was never reviewed (or ever set to "needs 
> review", it seems).  But since all it does is to add one function to 
> one class, it should be hard to add the function yourself.  This would 
> be a good way into Sage development, if you have not done any before, 
> especially since you clearly have some motivation for it! 
>
> If you are going to patch a local version of Sage then you will need 
> to make your own clone of the full source distribution first -- see 
> the developers' manual.  I note that you were trying to use "sudo", 
> but note that you should never build or run Sage as root.  Build it in 
> your own directory. 
>
> John Cremona 
>
> On 21 March 2015 at 15:54,  <[email protected] <javascript:>> wrote: 
> > I have the most recent version of sage. I want to ask 
> > how to add the patch for the ticket 
> http://trac.sagemath.org/ticket/12051. 
> > I tried $sudo ./sage --dev import-patch --url 
> > http://trac.sagemath.org/attachment/ticket/12051/12051_LLL_QQ.patch 
> > but it failed to added. 
> > I am sure that to previous versions (I don't remember exactly the 
> versions!) 
> > of sage it worked. 
> > Also, why this patch did not applied to the recent versions of sage? 
> > It would be nice to have LLL for rational (not integers) matrices. 
> > thank you 
> > Costas 
> > 
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