What this snippet does
WeakValueDictionary allows caching objects that will be garbage collected when no strong refs remain.
Expected output
Cached without preventing GC
Why practise typing this
Typing memory management code builds muscle memory for the symbols and indentation Python uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
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