Class MessageMeta

• Defined in File meta.hpp

Derived Type

• public morpheus::SlicedMessageMeta (Class SlicedMessageMeta)

class MessageMeta

Container for class holding a data table, in practice a cudf DataFrame, with the ability to return both Python and C++ representations of the table.

Subclassed by morpheus::SlicedMessageMeta

Public Functions

TensorIndex count() const

Get the py table object.

Returns

pybind11::object

virtual TableInfo get_info() const

Get the info object.

Returns

TableInfo

virtual MutableTableInfo get_mutable_info() const

TODO(Documentation)

bool has_sliceable_index() const

Returns true if the underlying DataFrame’s index is unique and monotonic. Sliceable indices have better performance since a range of rows can be specified by a start and stop index instead of requiring boolean masks.

Returns

bool

virtual std::optional<std::string> ensure_sliceable_index()

Replaces the index in the underlying dataframe if the existing one is not unique and monotonic. The old index will be preserved in a column named _index_{old_index.name}. If has_sliceable_index() == true, this is a no-op.

Returns

std::string The name of the column with the old index or nullopt if no changes were made.

Public Static Functions

static std::shared_ptr<MessageMeta> create_from_python(pybind11::object &&data_table)

Create MessageMeta cpp object from a python object.

Parameters

data_table –

Returns

std::shared_ptr<MessageMeta>

static std::shared_ptr<MessageMeta> create_from_cpp(cudf::io::table_with_metadata &&data_table, int index_col_count = 0)

Create MessageMeta cpp object from a cpp object, used internally by create_from_cpp

Parameters

• data_table –

• index_col_count –

Returns

std::shared_ptr<MessageMeta>

Protected Functions

MessageMeta(std::shared_ptr<IDataTable> data)

Protected Attributes

std::shared_ptr<IDataTable> m_data

Protected Static Functions

static pybind11::object cpp_to_py(cudf::io::table_with_metadata &&table, int index_col_count = 0)

Create MessageMeta python object from a cpp object.

Parameters

• table –

• index_col_count –

Returns

pybind11::object