Static-frame

Unified implementation of ``IndexBase`` set and concatenation operations.

Added ``IndexHierarchy.from_values_per_depth()`` constructor.

Set ``automap`` version to 0.6.1.

Extended ``Batch.astype`` interface to fully cover ``Frame.astype`` interface.

Added ``memory`` property to display memory usage via ``MemoryDisplay`` interfaces.

Implemented the DataFrame Interchange Protocol export via the ``Frame.__dataframe__()`` interface.

Implemented ``__repr__()`` for ``ILoc``.

Updated ``Batch.__repr__()``.

Added ``name`` parameter to ``Frame.to_frame()``, ``Series.to_frame()``, and related methods.

Improved error reporting for invalid ``IndexHierarchy``.

``IndexHierarchy.from_index_items()`` now supports items of ``IndexHierarchy``.

Added ``__repr__()`` for ``HLoc``.

Added ``IndexHierarchy.index_at_depth()``

Added ``IndexHierarchy.indexer_at_depth()``

Added ``depth_level`` and ``order_by_occurrence`` parameters to ``unique()`` on ``IndexBase`` subclasses.

Corrected issue calling ``Frame.to_pandas()`` with an empty ``Frame``.

Implemented argument checking on all ``IndexHierarchy`` depth selection parameters.

``IndexHierarchy.astype()`` now accepts a ``dtypes`` argument to assign dtypes by tuple or mapping.

Corrected return type of ``via_str.contains()`` to return Booleans.

Added ``Frame.corr()``, ``Series.corr()``, and ``Batch.corr()``.

Added ``compression`` argument to ``StoreClientMixin`` exporters that write ZIPs.

Corrected issue with selection on zero-sized ``IndexHierarchy``.

Added ``to_zip_npy()`` and ``from_zip_npy()`` interfaces to ``Bus``, ``Batch``, ``Yarn``, and ``Quilt``.

Added ``test_example_gen.py`` to test and enforce automatic example generation.

Improved usage of ``__slots__`` throughout.

Continuous integration quality checks now using pylint 2.15.0 and isort 5.10.1

ErrorNPYEncode`` exceptions raised during authoring NPZ files or NPY directories now remove those files or directories.

``ErrorNPYEncode`` exceptions raised during ``to_zip_npz()`` now remove the archive.

Authoring NPYs to a pre-existing directory will now raise a ``RuntimeError``.