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Taking the strongest version of the argument Python is partly standardized in multiple implementations. My understanding is that mostly CPython does whatever i

• int_19h 6y ago
  Not quite - CPython docs specifically say that some things are implementation-specific, and that other implementations are free to do them differently. For example, there's no guarantee of refcounting, and portable Python code has to assume that implicit cleanup is non-deterministic (which is observable with __del__). The problem, rather, is that coders tend to ignore this, and write code that only works on CPython.
  • afiori 6y ago
    This is what I meant as the advantage of multiple implementations, by "CPython does whatever it wants" I meant that the power dynamics are almost exclusively in favour of CPython