Why doesn't eval of generator expression work with locals?

[Fabio Zadrozny]

On Tue, Jan 27, 2009 at 9:51 PM, James Mills
<prologic at shortcircuit.net.au> wrote:
> On Wed, Jan 28, 2009 at 9:31 AM, Fabio Zadrozny <fabiofz at gmail.com> wrote:
>> Anyone knows why the code below gives an error?
>>
>> global_vars = {}
>> local_vars = {'ar':["foo", "bar"], 'y':"bar"}
>> print eval('all((x == y for x in ar))', global_vars, local_vars)
>
> y is undefined in your generator expression.

Yes... but why? It seems to me like it should be defined (if I put the
locals in the globals it finds it... seems very weird to me)

> Why are you using eval ?

I'm using it to evaluate what the user entered on a watch expression
in the Pydev debugger (bug:
https://sourceforge.net/tracker2/?func=detail&aid=2541355&group_id=85796&atid=577329
)... That's just a sample to reproduce it without any dependencies.

Cheers,

Fabio