Tnx! srange does the tric. Maybe srange (instead of range) should be
promoted far more for this reason! Roland
On 6 sep, 00:52, Timothy Clemans [EMAIL PROTECTED] wrote:
srange gives a list of Sage integers and follows the syntax of range.
On Fri, Sep 5, 2008 at 5:41 PM, Harald Schilly [EMAIL PROTECTED] wrote:
hello roland
I cross posted this on the sage-support mailing list
http://groups.google.com/group/sage-support
regarding your bugreport:
http://spreadsheets.google.com/pub?key=pCwvGVwSMxTzT6E2xNdo5fA
In loop /' operand incorrect
Hi. Please view worksheet which is publicly viewable
athttp://75.75.6.176:80/home/pub/0
In a loop, and only then, suddenly 583/2 becomes 291 ...?
Roland, sage 3.1.1 on Windows/VMWare
the problem is, that range is a native python command and all this
happens because it is python only.
if you just enter numbers, sage preparses them as Integer(n) .. then
they are more complex objects.
there is not much to do about this, either convert to sage integers or
well, someone has to break python - but that's extremely dangerous.
so, as long as i understood your lengthy example correct, here are two
commands, run in pure python to clarify:
for i in range(1,6): print i/2
...
0
1
1
2
2
for i in range(1,6): print float(i)/2
...
0.5
1.0
1.5
2.0
2.5
-
in sage
sage: preparse(for i in range(1,6): print i/2)
'for i in range(Integer(1),Integer(6)): print i/Integer(2)'
above, division by an integer!
sage: for i in range(1,6): print i/2
:
1/2
1
3/2
2
5/2
also, you can use the type command to get the objects type. native
integers are int and sage's Integer
h
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