[Python-Dev] Accessing globals without dict lookup
Guido van Rossum
Sun, 10 Feb 2002 19:10:53 -0500
> > In the face of exec statements or calls to execfile can't the
> > compiler just generate the usual LOAD_NAME fallback instead of the new-
> > fangled LOAD_GLOBAL opcode?
> Note that exec doesn't have to be passed a string: you can pass it a
> compiled code object just as well. The compiler can't guess how a
> code object will be used at the time it's compiled. In theory there
> would be nothing to stop exec from rewriting the bytecode in a
> compiled code object passed to it, but I doubt we could get Guido to
> buy that trick until he first buys rewriting bytecode to set
> debugger breakpoints <wink>.
Arg. So much for that idea. (Although I think the mutable bytecode
idea *is* the right idea for setting breakpoints after all.)
--Guido van Rossum (home page: http://www.python.org/~guido/)