ak.backend
----------

.. py:module: ak.backend

Defined in `awkward.operations.ak_backend <https://github.com/scikit-hep/awkward-1.0/blob/21f485b45e31dcd53968a279e47e4df4596a194b/src/awkward/operations/ak_backend.py>`__ on `line 6 <https://github.com/scikit-hep/awkward-1.0/blob/21f485b45e31dcd53968a279e47e4df4596a194b/src/awkward/operations/ak_backend.py#L6>`__.

.. py:function:: ak.backend()


    :param arrays: Array-like data (anything :py:obj:`ak.to_layout` recognizes).

Returns the names of the backend used by ``arrays``. This name may be

* ``"cpu"`` for arrays backed by NumPy;
* ``"cuda"`` for arrays backed by CuPy;
* ``"jax"`` for arrays backed by JAX;
* None if the objects are not Awkward, NumPy, JAX, or CuPy arrays (e.g.
  Python numbers, booleans, strings).

See :py:obj:`ak.to_backend`.