CSV

读取csv

1import polars as pl
2
3pl.read_csv("parse_time_from_file.csv")

写入csv

1import polars as pl
2
3df = pl.DataFrame({"foo":[1,2,3],"bar":["None","bak","baz"]})
4df.write_csv("write_df.csv")

扫描csv

scan_csv会创建一个惰性的DataFrame, 不会立即读取文件

1import polars as pl
2
3lazydf: pl.LazyFrame = pl.scan_csv("parse_time_from_file.csv")