What this snippet does
A dataclass cannot have a non-default field after a base class field with a default.
Expected output
TypeError: non-default argument 'y' follows default argument
Why practise typing this
Typing dataclasses (advanced) 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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