On 4 Mrz., 08:35, Jason Grout <jason-s...@creativetrax.com> wrote:
> But you could do this:
>
> sage: alpha=var("α")
> sage: alpha
> α
Sure one could. But the point is that var is supposed to insert the
variable into the global name space, under the given name.
What about the following idea:
1. var(s) only accept strings and lists of strings, and for backwards
compatibility one could also make it accept objects whose string
representation does not contain commas or whitespace. So,
var(QQ['t'].gen()) is fine, but with input like var(QQ['t']), an error
is raised.
2. If the input is a valid identifier (all ascii) and not a reserved
Python keyword, it will be inserted into the global namespace.
3. Otherwise, a variable with the given name is returned, but *not*
put into the global namespace. We may think of printing a warning
message in that case. In that way, alpha=var("α") would still work.
Cheers,
Simon
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