Bram's suggestion of a 'scrambled dictionary' is definitely an interesting method of testing for erroneous order dependencies, but I'm unconvinced it deserves to be promoted to a language feature. If he's worried about the code changes in his own project, perhaps Python's introspection tools could be used to replace all instances of Python lists with a custom implementation, assuming dictionary creation is an "up-front" operation.
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Bram's suggestion of a 'scrambled dictionary' is definitely an interesting method of testing for erroneous order dependencies, but I'm unconvinced it deserves to be promoted to a language feature. If he's worried about the code changes in his own project, perhaps Python's introspection tools could be used to replace all instances of Python lists with a custom implementation, assuming dictionary creation is an "up-front" operation.