"Cameron Laird" <[EMAIL PROTECTED]> wrote in message 
news:[EMAIL PROTECTED]
|| Peter is trying to communicate that some aspects of Python are
| quite conservative, well-documented, and unlikely to change
| across versions or implementations.  The syntax of, let's say,
| "def", is an example of such an aspect.
|
| Peter has no particular evidence about the guarantees of the
|    sys._getframe(1).f_code.co_consts[0]
| resolution; for all he or I know, the core Python maintainers
| might change in an upcoming release the implementation of
| co_consts.  That's what I believe he intends you understand by
| "brittle".

There is also no reason to expect that such code would work with Python 
interpreters other than CPython.

tjr



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