Lib/weakref.py · 99d212a5488604cfb617fee765b33e2b0afbc8a9 · Kirill Smelkov / cpython · GitLab

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ReferenceError is now built-in, so pick it up from the right place. · 99d212a5
Fred Drake authored Oct 05, 2001
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It still needs to be here to preserve the API.
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99d212a5