On May 30, 2007, at 9:30 PM, Green Kobold wrote:
> > in the middle of a code (600 lines), i use a AlternatingGroup and get > always the same error: > > Traceback (most recent call last): > File "../../python/dev/wx-dev/granulador8.py", line 496, in MkSnd > MakeGrains(self.name) > File "../../python/dev/wx-dev/granulador8.py", line 335, in __init__ > AlternatingGroup(4) > File "/home/ref/Desktop/packages/sage/local/lib/python2.5/site- > packages/sage/groups/perm_gps/permgroup.py", > line 1064, in __init__ > raise ValueError, "n (=%s) must be an integer >= 1 or a list"%n > ValueError: n (=4) must be an integer >= 1 or a list > > what is very strange is that I use CyclicPermutationGroup and > SymmetricGroup and DihedralGroup with no problems. There is no other > AlternatingGroup in the script. And the error is there for simple > inputs such as AlternatingGroup(2). > I changed 'from sage.all import *', to 'import sage.all as S' and > imported sage.all close to the AlternatingGroup statement. No improve. > Is that a bug? Is there any ideas to work it out? For some strange reason the AlternatingGroup constructor requires a SAGE integer, not a python integer. If you call AlternatingGroup(4) from the SAGE prompt, it will work, because the preparser converts 4 into Integer(4). But in a python script it won't work. As a temporary workaround you can call AlternatingGroup(Integer(4)) directly. I will look into this further. david --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~----------~----~----~----~------~----~------~--~---
