ArrowNumpySchema

class lsst.daf.butler.formatters.parquet.ArrowNumpySchema(numpy_dtype: np.dtype)

Bases: object

Wrapper class for a schema for a numpy ndarray.

Parameters:

numpy_dtype : numpy.dtype

Numpy dtype to convert.

Attributes Summary

schema

Methods Summary

from_arrow(schema)	Convert an arrow schema into an ArrowNumpySchema.
to_arrow_astropy_schema()	Convert to an ArrowAstropySchema.
to_arrow_schema()	Convert to a pyarrow.Schema.
to_dataframe_schema()	Convert to a DataFrameSchema.

Attributes Documentation

schema

Methods Documentation

classmethod from_arrow(schema: pyarrow.lib.Schema) → lsst.daf.butler.formatters.parquet.ArrowNumpySchema

Convert an arrow schema into an ArrowNumpySchema.

Parameters:

schema : pyarrow.Schema

Pyarrow schema to convert.

Returns:

numpy_schema : ArrowNumpySchema

to_arrow_astropy_schema() → lsst.daf.butler.formatters.parquet.ArrowAstropySchema

Convert to an ArrowAstropySchema.

Returns:

astropy_schema : ArrowAstropySchema

to_arrow_schema() → pyarrow.lib.Schema

Convert to a pyarrow.Schema.

Returns:

arrow_schema : pyarrow.Schema

to_dataframe_schema() → lsst.daf.butler.formatters.parquet.DataFrameSchema

Convert to a DataFrameSchema.

Returns:

dataframe_schema : DataFrameSchema