Hi, Johannes,
On Jul 4, 2010, at 07:24 , Johannes wrote:
i just tried to create a extended Version of LatticePolytope, but it
did
not work.
I always get the following error:
Error when calling the metaclass bases function() argument 1 must be
code, not str.
i found out this is because LatticePolytope is not a class, but a
function.
otherwise, the type of LatticePolytope(somePoints) is given as:
sage.geometry.lattice_polytope.LatticePolytopeClass.
How can i extend this?
Where can i find informations about this class?
I can't help with the details of the Lattice Polytope code, but this
may help. Since I'm not sure of your understanding of the Sage
system, I'm not sure of how much you know, so this is basic info:
In general, given a Sage (or Python) object 'x', typing 'x.
[TAB]' (i.e., 'x.' followed by the TAB key) will give you a list of
methods associated to 'x' (or to its type; also, not all listed items
may be implemented for a given object).
Also, typing "str[TAB]" will give you a list of all known (global)
names beginning with "str".
If you type something like "s1.polar?" (from your previous email),
Sage will respond with whatever documentation is provided by the
implementor of the "polar()" method for Lattice Polytopes. With a
double "??", you get documentation and possibly the code that
implements it (if Sage can find it). For this to work, "s1" must be
the full name of an object, class, function, or method (sometimes
'str[tab]?' works wonders :-}).
At the beginning of each of the latter output lists is a line
beginning "File: ". This line contains the full path to the source
file where the code lives, so you can examine things like class
definitions and function or method implementations.
HTH
Justin
--
Justin C. Walker, Curmudgeon at Large
Institute for the Absorption of Federal Funds
-----------
My wife 'n kids 'n dogs are gone,
I can't get Jesus on the phone,
But Ol' Milwaukee's Best is my best friend.
-----------
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