An expression that rebinds a variable?

[GreenH]

On May 17, 9:15 am, Maric Michaud <m... at aristote.info> wrote:
> GreenH a écrit :
>
> > Can I know what kind of expressions rebind variables, of course unlike
> > in C, assignments are not expressions (for a good reason)
> > So, eval(expr) should bring about a change in either my global or
> > local namespace, where 'expr' is the expression
>
> For global scope you could use globals().__setitem__('x', 5) but it's
> not possible in local scope because the dict returned by locals() in
> function is not where the local variables are really stored.
>
> So the preferred way is to use :
>
> In [39]: exec "x=5"
>
> which the same as :
>
> In [40]: eval(compile('x=5', '<string>', 'exec'))
>
> --
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>
> Maric Michaud
> _____________
>
> Aristote -www.aristote.info
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Thanks, But, my interest is actually in finding the cases in which
eval(expr) would throw surprises at me by bringing changes in
namespace(s), just because I haven't given a namespace for that eval()
i.e., where would we see the perils of not passing namespace to the
'eval'.

-Green