Thank you! That's precisely what I needed. On Sep 23, 5:40 am, Marco Streng <marco.str...@gmail.com> wrote: > > On Thu, Sep 22, 2011 at 1:37 PM, Anna Haensch <annahaen...@gmail.com> wrote: > > > Is there any way in sage, or rather python, to define a function which > > > takes as its input n variables, rather than assigning a fixed > > > number? > > > > I've just written a piece of code for the Quadratic Forms module, > > > which takes as input a Quadratic Lattice, Q, and three vectors, so > > > (Q,v_1,v_2,v_3), and it generates the lattice L which is on the same > > > underlying quadratic space as Q but with basis v_1,v_2,v_3. > > Why not simply use a list v with elements v_1,v_2,...,v_n? > > So input (Q, [v_1,v_2,v_3]) into a function > sage: def(Q, v): > ....: # start by unpacking the elements of v > ....: > > Mike's example would become > > sage: def f(v): > ....: return sum(v) > ....: > sage: f([1,2,3]) > 6 > sage: f([2,3,5,8]) > 18
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