Word frequency

Counter over split words.

dict counter

Implement `word_freq(text: str) -> dict[str, int]`.

Split on whitespace; case-insensitive; strip punctuation from word edges.

Constraints

len(text) ≤ 10^5

Example

>>> word_freq("the cat sat on the mat")
{"the": 2, "cat": 1, "sat": 1, "on": 1, "mat": 1}

10 points ~10 min

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Hints

text.lower().split(); strip punctuation with str.strip('.,!?').

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