DataFrameSchema¶

class lsst.daf.butler.formatters.parquet.DataFrameSchema(dataframe: pd.DataFrame)¶

Wrapper class for a schema for a pandas DataFrame.

Parameters:	dataframe : `pandas.DataFrame` Dataframe to turn into a schema.

Attributes Summary

Methods Summary

`from_arrow`(schema)	Convert an arrow schema into a `DataFrameSchema`.
`to_arrow_astropy_schema`()	Convert to an ArrowAstropySchema.
`to_arrow_numpy_schema`()	Convert to an `ArrowNumpySchema`.
`to_arrow_schema`()	Convert to an arrow schema.

Attributes Documentation

Methods Documentation

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

Convert an arrow schema into a DataFrameSchema.

Parameters:	schema : `pyarrow.Schema` The pyarrow schema to convert.
Returns:	dataframe_schema : `DataFrameSchema`

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

Convert to an ArrowAstropySchema.

Returns:	arrow_astropy_schema : `ArrowAstropySchema`

to_arrow_numpy_schema() → lsst.daf.butler.formatters.parquet.ArrowNumpySchema¶

Returns:	arrow_numpy_schema : `ArrowNumpySchema`

to_arrow_schema() → pyarrow.lib.Schema¶

Convert to an arrow schema.

Returns:	arrow_schema : `pyarrow.Schema`