ak.typetracer.PlaceholderArray
==============================

Defined in `awkward._nplikes.placeholder <https://github.com/scikit-hep/awkward/blob/80c3e39415a29a29ae2ffcc089f09e6de9e17fa2/src/awkward/_nplikes/placeholder.py>`__ on `line 16 <https://github.com/scikit-hep/awkward/blob/80c3e39415a29a29ae2ffcc089f09e6de9e17fa2/src/awkward/_nplikes/placeholder.py#L16>`__.

.. py:class:: ak.typetracer.PlaceholderArray(nplike: awkward._nplikes.numpy_like.NumpyLike, shape: tuple[awkward._nplikes.shape.ShapeItem, Ellipsis], dtype: awkward._typing.DType, buffer_key: str | None = None)



   Base class for protocol classes.

   Protocol classes are defined as::

       class Proto(Protocol):
           def meth(self) -> int:
               ...

   Such classes are primarily used with static type checkers that recognize
   structural subtyping (static duck-typing), for example::

       class C:
           def meth(self) -> int:
               return 0

       def func(x: Proto) -> int:
           return x.meth()

       func(C())  # Passes static type check

   See PEP 544 for details. Protocol classes decorated with
   @typing.runtime_checkable act as simple-minded runtime protocols that check
   only the presence of given attributes, ignoring their type signatures.
   Protocol classes can be generic, they are defined as::

       class GenProto(Protocol[T]):
           def meth(self) -> T:
               ...


   .. py:attribute:: _nplike


   .. py:attribute:: _shape


   .. py:attribute:: _dtype


   .. py:attribute:: _buffer_key
      :value: None



   .. py:property:: buffer_key
      :type: str | None



   .. py:property:: dtype
      :type: awkward._typing.DType



   .. py:property:: shape
      :type: tuple[awkward._nplikes.shape.ShapeItem, Ellipsis]



   .. py:property:: ndim
      :type: int



   .. py:property:: size
      :type: awkward._nplikes.shape.ShapeItem



   .. py:property:: nbytes
      :type: int



   .. py:method:: materialize()


   .. py:property:: strides
      :type: tuple[awkward._nplikes.shape.ShapeItem, Ellipsis]



   .. py:property:: T


   .. py:method:: view(dtype: numpy.typing.DTypeLike) -> awkward._typing.Self


   .. py:method:: tolist()