What this snippet does
Passing a mutable object to a function passes the reference, so modifications inside the function affect the original.
Expected output
[1, 2, 'new']
Why practise typing this
Typing variables & types 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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