#NEWLINE# def transform_source_example( self , source_example , source_name ) : #NEWLINE# #INDENT# 'Applies a transformation to an example from a source.\n\n        Parameters\n        ----------\n        source_example : :class:`numpy.ndarray`\n            An example from a source.\n        source_name : str\n            The name of the source being operated upon.\n\n        ' #NEWLINE# raise NotImplementedError ( '`{}` does not support examples as input, but the wrapped data stream produces examples.' . format ( self . __class__ . __name__ ) )