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a A protocol for representing nested sequences.
Warning
-------
`_NestedSequence` currently does not work in combination with typevars,
*e.g.* ``def func(a: _NestedSequnce[T]) -> T: ...``.
See Also
--------
collections.abc.Sequence
ABCs for read-only and mutable :term:`sequences`.
Examples
--------
.. code-block:: python
>>> from __future__ import annotations
>>> from typing import TYPE_CHECKING
>>> import numpy as np
>>> from numpy._typing import _NestedSequence
>>> def get_dtype(seq: _NestedSequence[float]) -> np.dtype[np.float64]:
... return np.asarray(seq).dtype
>>> a = get_dtype([1.0])
>>> b = get_dtype([[1.0]])
>>> c = get_dtype([[[1.0]]])
>>> d = get_dtype([[[[1.0]]]])
>>> if TYPE_CHECKING:
... reveal_locals()
... # note: Revealed local types are:
... # note: a: numpy.dtype[numpy.floating[numpy._typing._64Bit]]
... # note: b: numpy.dtype[numpy.floating[numpy._typing._64Bit]]
... # note: c: numpy.dtype[numpy.floating[numpy._typing._64Bit]]
... # note: d: numpy.dtype[numpy.floating[numpy._typing._64Bit]]
returnintc t )zImplement ``len(self)``.NotImplementedErrorselfs U/opt/cloudlinux/venv/lib64/python3.11/site-packages/numpy/_typing/_nested_sequence.py__len__z_NestedSequence.__len__= !! index _T_co | _NestedSequence[_T_co]c d S N r r s r __getitem__z_NestedSequence.__getitem__A s LOCr slice_NestedSequence[_T_co]c d S r r r s r r z_NestedSequence.__getitem__C s FIcr c t )zImplement ``self[x]``.r r s r r z_NestedSequence.__getitem__F r r xobjectboolc t )zImplement ``x in self``.r )r r$ s r __contains__z _NestedSequence.__contains__J r r (Iterator[_T_co | _NestedSequence[_T_co]]c t )zImplement ``iter(self)``.r r s r __iter__z_NestedSequence.__iter__N r r c t )z Implement ``reversed(self)``.r r s r __reversed__z _NestedSequence.__reversed__R r r valuer c t )z,Return the number of occurrences of `value`.r r r. s r countz_NestedSequence.countV r r c t )z"Return the first index of `value`.r r0 s r r z_NestedSequence.indexZ r r N)r r )r r r r )r r r r! )r$ r% r r& )r r) )r. r r r ) __name__
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