U c@sdZddlmZddlZddlZddlZddlmZddl Z ddl m Z GdddZ Gdd d Zd d d d dZGdddeZdS)zE Utility functions and objects for implementing the interchange API. ) annotationsN)DtypeObj)is_datetime64_dtypec@sXeZdZdZdZdZdZdZdZdZ dZ d Z d Z d Z d Zd ZdZdZdZdZdZdZdS) ArrowCTypesz Enum for Apache Arrow C type format strings. The Arrow C data interface: https://arrow.apache.org/docs/format/CDataInterface.html#data-type-description-format-strings nbcCsSiIlLefguZtdDZtdmzts{resolution}:{tz}ztt{resolution}N)__name__ __module__ __qualname____doc__ZNULLZBOOLZINT8ZUINT8ZINT16ZUINT16ZINT32ZUINT32INT64ZUINT64ZFLOAT16ZFLOAT32ZFLOAT64STRINGZDATE32ZDATE64 TIMESTAMPZTIMErrA/tmp/pip-unpacked-wheel-g7fro6k3/pandas/core/interchange/utils.pyrs&rc@s eZdZdZdZdZdZdZdS) Endiannessz.Enum indicating the byte-order of a data-type.<>=|N)rrrrZLITTLEZBIGZNATIVEZNArrrrr3s rrstr)dtypereturncCst|tjrtjS|tdkr&tjStt|j d}|dk rD|St |rt dttj|jddd}tjj|ddStd|d dS) a  Represent pandas `dtype` as a format string in Apache Arrow C notation. Parameters ---------- dtype : np.dtype Datatype of pandas DataFrame to represent. Returns ------- str Format string in Apache Arrow C notation of the given `dtype`. ONz\[(.*)\]r) resolutiontzzConversion of z- to Arrow C format string is not implemented.) isinstancepdZCategoricalDtyperrnpr#rgetattrnameupperrrefindalltypingcastr"rformatNotImplementedError)r#Z format_strr(rrrdtype_to_arrow_c_fmt<s $ r6c@seZdZdZdS)NoBufferPresentz6Exception to signal that there is no requested buffer.N)rrrrrrrrr7^sr7)r __future__rr0r2Znumpyr,Zpandas._typingrZpandasr+Zpandas.api.typesrrrr6 Exceptionr7rrrrs   ! "