What this snippet does
lru_cache requires arguments to be hashable; lists and dicts raise TypeError.
Expected output
TypeError: unhashable type: 'list'
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.
More Python practice
- Chain IterablesItertools & Functools · advanced
- Grouping DataItertools & Functools · advanced
- Groupby SortingItertools & Functools · advanced
- LRU CacheItertools & Functools · advanced
- Cached FetchItertools & Functools · advanced
- Dynamic TypingVariables & Types · beginner