Polars 速度快、语法现代、表达力强，但很多人刚上手就把它当 Pandas 用，结果性能优势全都浪费了。下面是新手最容易犯的 10 个错误，以及对应的解决思路。1、直接 read_csv而不用 scan_*新手拿到一个大 CSV，上来就这么写： ...

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