A second __builtins__- or globals()-like namespace.

[Daniel Dittmar]

Jacek Generowicz wrote:
> Python looks up names firstly in the nested function namespaces, then
> the global namespace, and finally in builtins, raising NameError if it
> fails to find a binding in any of those.
>
> Would it be possible (without hacking the interpreter) to add in
> another namespace somewhere into this search hierarchy?

You could try to replace the __builtins__ module with an object of your own
liking.

class IntermediateScope:
    def __init__ (self, outerscope, **kwargs):
        for name, value in kwargs.items ():
            setattr (self, name, value)
        self.outerscope = outerscope

    def __getattr__ (self, name):
        return getattr (self.outerscope, name)

sys.modules ['__builtins__'] = IntermediateScope (__builtins__, myvar =
myvalue)

I haven't tested whether this works at all and what the effect on error
messages could be.

Daniel