Re: [Python-Dev] Re: Making mutable objects readonly

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"ESR" == Eric S Raymond writes:

ESR> Fortunately, there's a semantics that captures both. If we ESR> allow freeze to take an optional key argument, and require ESR> that an unfreeze call must supply the same key or fail, we ESR> get both worlds. We can even one-way-hash the keys so they ESR> don't have to be stored in the bytecode. ESR> Want to lock a structure permanently? Pick a random long ESR> key. Freeze with it. Then throw that key away... Clever!