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So yeah, half of Python might still be Turing-complete, but it wouldn’t really be Python for any practical purpose. Just like how a device that can’t multiply

• TZubiri 3mo ago
  If you write a program in python, say a hello world: ' def hello_world(): print("hello, world") ' Is that not python? Yet it uses a subset of python? That program can be run by either a python runtime, or a python subset runtime. Now if you were to run a python subset program, like a hello world, you would get: ' def hello_world(): print("hello, world") ' Whoah, it's the same thing. Turns out every program you write with a subset of a language, is valid for the super language. Subjectively also, if the subset is big enough, it feels like that language, if it uses 'def' for functions, that's python. 'I know it when I see it' kinda deal. I think the confusion comes from the mathematical folk reading "subset of X is X", and implying that "subset of X=X". But this is natural language, not mathematical language, when I say that "dog is mammal", I'm not saying that "dog = mammal" I'm saying that "dog ∈ mammal", and "subset of python ∈ python"