What this snippet does
OrderedDict maintains insertion order, though standard dicts have preserved order since Python 3.7.
Expected output
['a', 'b']
Why practise typing this
Typing standard library (collections) 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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