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1import polars as pl 2 3pl.read_csv("parse_time_from_file.csv")
1import polars as pl 2 3df = pl.DataFrame({"foo":[1,2,3],"bar":["None","bak","baz"]}) 4df.write_csv("write_df.csv")
scan_csv会创建一个惰性的DataFrame, 不会立即读取文件
scan_csv
1import polars as pl 2 3lazydf: pl.LazyFrame = pl.scan_csv("parse_time_from_file.csv")