How to use the exec statement

[JB]

Alex Martelli wrote:
> Well, if your +specs+ include using exec, then there's
> little you can do to *avoid* exec.

I have no /specs/ but if I did not use exec, I should have 
to write a parser.

> However, fortunately, no part of the spec states that the
> exec MUST be in an existing namespace.  Therefore, you
> can avoid the worst problems: build an artificial
> namespace (i.e., a suitably prepared dictionary) in which
> these statements are to execute -- populate it with
> whatever set of names you think the user will need (module
> r_exec is also a possibility).

How can I do this?

-- 
Janos Blazi


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