[Python-Dev] Oberver Pattern

[Tim Peters]

[Guido]
> Also, it would break binary compatibility (which we try to
> maintain for 3rd party extensions, despite appearances).

[Stephen J. Turnbull]
> The missing <wink> is a typo, right?

Nope!  Even if you get a warning about binary API mismatch across releases,
it's *just* a warning -- the extension is very likely to run correctly
despite it.  For example, the binary API got bumped for 2.1 because new
parameters were added to PyCode_New() and PyFrame_New(), but few extensions
have a reason to use those functions.