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Oh, interesting. But from what I read it's only an implementation detail of CPython? With `with`I can't eg. pass an open file to another function to eg. be clo

• manwe150 7y ago
  That's probably a tricky question, since CPython is also essentially the spec. PyPy talks a bit about this: http://doc.pypy.org/en/latest/cpython_differences.html#differences-related-to-garbage-collection-strategies http://doc.pypy.org/en/latest/cpython_differences.html#diffe... That's true, since Python has reflection it can't easily optimize that case, whereas that's a powerful benefit of having a linear type system for tracking ownership like Swift or Rust. But early freeing (which Rust has and Python does not) is slightly different from deterministic freeing (which both have) is slightly different from guaranteed freeing (which CPython has and Rust does not).