thnx, i did not know all about the sagehelp. but the ?? is a wonderfull feature. I'll look at the code next, and i hope it helps me somehow. gretz Johannes. Am 04.07.2010 23:52, schrieb Justin C. Walker: > 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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