def ConvertNumpyArrayToLiteral(value):
"""Converts a Numpy array or a nested tuple thereof to an XLA literal."""
if isinstance(value, tuple):
literal = xla_data_pb2.LiteralProto()
literal.shape.CopyFrom(xla_shape.CreateShapeFromNumpy(value).message)
for component in value:
component_literal = literal.tuple_literals.add()
component_literal.CopyFrom(ConvertNumpyArrayToLiteral(component))
return literal
else:
return _ConvertNumpyArrayToLiteral(value)
def _ConvertNumpyArrayToLiteral(ndarray):
"""Converts a Numpy array to a XLA literal."""
type_record = types.MAP_DTYPE_TO_RECORD[str(ndarray.dtype)]
literal = xla_data_pb2.LiteralProto()
literal.shape.CopyFrom(xla_shape.CreateShapeFromNumpy(ndarray).message)
if ndarray.ndim == 0:
getattr(literal, type_record.literal_field_name).append(
ndarray.astype(type_record.literal_field_type).item())
else:
# Ndarrays with boolean dtypes need special type conversion with protobufs
if ndarray.dtype in {_np.bool_, _np.dtype('bool')}:
for element in _np.nditer(ndarray):
getattr(literal, type_record.literal_field_name).append(
type_record.literal_field_type(element))
else:
ndarray_flat = ndarray.ravel(order='A')
getattr(literal, type_record.literal_field_name).extend(ndarray_flat)
return literal
