ASKSAGE: Sage Q&A Forum - Latest question feedhttp://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Sun, 10 May 2015 16:42:04 -0500How to make "zip" work faster?http://ask.sagemath.org/question/26790/how-to-make-zip-work-faster/ I have these two finite sets $A$ and $B$ where the size of $A$ is typically much larger than the size of $B$. (typically $|A| is 200-500$ and $|B| is 10-50$) I am trying to enumerate all possible maps from $B$ to $A$ using the following idea - but this turns out to be very slow.
- Is there a way to speed this up?
- Without the over all "for i" loop can I access any one of the "k"s?
(for every i each $l$ is a list of tuples)
How can I just pick out any one such "k" list without wanting to wait for the whole code to run.
S = []
from itertools import product
for i in product(A,repeat = len (B)):
k = zip(B,i)
S.append(k)
show(S)PhoenixSun, 10 May 2015 16:42:04 -0500http://ask.sagemath.org/question/26790/How do I extract/unpack the zip filehttp://ask.sagemath.org/question/8108/how-do-i-extractunpack-the-zip-file/I have down loaded the file sage-vmware-4.6.zip fom UK mirror.
When I try to open it (expand) I get the message "file invalid or corrupted" and of course nothing happens.
How do get to install this software ? etrcMon, 09 May 2011 02:20:58 -0500http://ask.sagemath.org/question/8108/