What this snippet does
Custom classes can intercept slice syntax via __getitem__ to implement domain-specific indexing.
Expected output
Rows 1 to 3
Why practise typing this
Typing slicing 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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