pandas导入csv转化成polars表

pandas导入csv转化成polars表dtypes_putie {ECI:int64,场景:str}defread_putie(dtypes):#读取普铁pt pd.read_csv(pth_pt,encodinggbk,usecolsdtypes.keys(),dtypedtypes)pt pl.from_dataframe(pt).select(dtypes.keys()).rename({ECI:eci,场景:普铁线路}).unique(subseteci,keepfirst)pt pt.with_columns((普铁_ pl.col(普铁线路)).alias(普铁线路))returnpt