even more simpler :-) :
sage: V=var("v", n=8)
sage: V
(v0, v1, v2, v3, v4, v5, v6, v7)
sage: v2
v2
sage: V[2]
v2
*“Who could ask for anything mooooore ?”*
Le mardi 8 mars 2022 à 08:20:07 UTC+1, slelievre a écrit :
> Even more practical, I find, is to name the tuple of indexed variables:
> ```
> sage: v = SR.var('v', n=8)
> sage: v
> (v0, v1, v2, v3, v4, v5, v6, v7)
> ```
> and to use index notation `v[k]` instead of `vk` to use the variables.
> ```
> sage: v[0]
> v0
> sage: v[7]
> v7
> ```
>
> That does not assign the variables to the names `v0` to `v7`:
> ```
> sage: v2
> Traceback (most recent call last)=
> ...
> NameError: name 'v2' is not defined
> ```
>
> If you really want to use `v0` to `v7` instead of `v[0]` to `v[7]`,
> follow the implementation in `var` (accessed with `var??`),
> which simply amounts to:
> ```
> G = globals()
> for vk in v:
> G[repr(vk)] = vk
> ```
>
> After that:
> ```
> sage: v2
> v2
> ```
>
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