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by munificent
2100 days ago
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> This isn't dynamic scoping; this is just a global variable with a stack of values. This isn't a latte; this is just an espresso with steamed milk added to it. :) What you describe basically is how dynamic scoping is mechanically implemented under the hood. |
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It's certainly how that's commonly emulated but that can leak out e.g. CPython uses threadlocals for decimal contexts, but if you set a localcontext in a coroutine / generator and suspend that, the information leaks out.
I assume the same happens with gevent unless you `patch_thread()`, and even then that assumes `decimal` always deref's threadlocals from the python-level module rather than statically resolve them.