o $i @s~dZddlmZddlmZddlmZddlZddlm Z ddl m Z ddl mZer4ddl mZmZeGd d d ZdS) zCStruct namespace for expression operations on struct-typed columns.) annotations) dataclass) TYPE_CHECKINGN)DataType) pyarrow_udf)ExprUDFExprc@s.eZdZUdZded<d dd Zd d d Zd S)_StructNamespaceaNamespace for struct operations on expression columns. This namespace provides methods for operating on struct-typed columns using PyArrow compute functions. Example: >>> from ray.data.expressions import col >>> # Access a field using method >>> expr = col("user_record").struct.field("age") >>> # Access a field using bracket notation >>> expr = col("user_record").struct["age"] >>> # Access nested field >>> expr = col("user_record").struct["address"].struct["city"] r_expr field_namestrreturn 'UDFExpr'cCs ||S)aExtract a field using bracket notation. Args: field_name: The name of the field to extract. Returns: UDFExpr that extracts the specified field from each struct. Example: >>> col("user").struct["age"] # Get age field # doctest: +SKIP >>> col("user").struct["address"].struct["city"] # Get nested city field # doctest: +SKIP )field)selfr rl/home/ubuntu/veenaModal/venv/lib/python3.10/site-packages/ray/data/namespace_expressions/struct_namespace.py __getitem__%s z_StructNamespace.__getitem__cs|tt}|jjr-|jj}tj|r-z | j }t |}Wn t y,Ynwt |ddfdd }||jS) zExtract a field from a struct. Args: field_name: The name of the field to extract. Returns: UDFExpr that extracts the specified field from each struct. ) return_dtypearr pyarrow.Arrayr cs t|S)N)pc struct_field)rr rr _struct_fieldIs z-_StructNamespace.field.._struct_fieldN)rrr r)robjectr data_type is_arrow_typeto_arrow_dtypepyarrowtypes is_structrtype from_arrowKeyErrorr)rr r arrow_type field_typerrrrr4s      z_StructNamespace.fieldN)r r r r)__name__ __module__ __qualname____doc____annotations__rrrrrrr s  r )r* __future__r dataclassesrtypingrrpyarrow.computecomputerray.data.datatyperray.data.expressionsrrrr rrrrs