Data Class Transforms （PEP 681） でtypingモジュールに追加された dataclass_ transform デコレーターは、これら （O/ Rマッパー、attrs、pydandic） などを使う際の型チェックをより便利にしてくれます。

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It is a handy tool for keeping a record of data explorations, creating charts, styling text and sharing the results of that work. For data analysis, the cornerstone package in Python is “Pandas”.