What this snippet does
__init_subclass__ is a hook called whenever a class is subclassed, replacing many metaclass uses.
Expected output
Created Child
Why practise typing this
Typing metaprogramming (modern) 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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