What this snippet does
groupby clusters consecutive elements of an iterable sharing the same key.
Expected output
ERROR [('ERROR', 'db'), ('ERROR', 'api')]
INFO [('INFO', 'start')]Why practise typing this
Typing itertools & functools 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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