What this snippet does
Accumulating string fragments in a list and joining at the end is the standard fast pattern in Python.
Expected output
<ul><li>a
Why practise typing this
Typing performance & optimization 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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