Re: [Python-Dev] Capabilities (we already got one)

On Tue, 2003-04-01 at 11:47, Zooko wrote:

I think that in restricted-execution-mode (hereafter: "REM", as per Greg Ewing's suggestion [1]), Python objects have encapsulation -- one can't access their private data without their permission.

Once this is done, Python references are capabilities.

REM does not provide object encapsulation, but it disables enough introspection that it is possible to provide encapsulation. The REM implementation provides a Bastion function that creates private state by storing the state in func_defaults, which is inaccessible in REM. Jeremy