[Python-Dev] PEP 3000 and exec
jimjjewett at gmail.com
Mon Oct 17 17:19:22 CEST 2005
Guido van Rossum wrote:
> Another idea might be to change the exec() spec so that you are
> required to pass in a namespace (and you can't use locals() either!).
> Then the whole point becomes moot.
I think of exec as having two major uses:
(1) A run-time compiler
(2) A way to change the local namespace, based on run-time
information (such as a config file).
By turning exec into a function with its own namespace (and
enforcing a readonly locals()), the second use is eliminated.
Is this intentional for security/style/efficiency/predictability?
If so, could exec/eval at least
(1) Be treatable as nested functions, so that they can *read* the
(2) Grow a return value, so that they can more easily pass
information back to at least a (tuple of) known variable name(s).
More information about the Python-Dev