Qiskit / qiskit / 10144976788

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Commit Message

Bitarray postselect (#12693) (#12836)

* define BitArray.postselect()

* add test for BitArray.postselect()

* lint

* remove redundant docstring text

* Update qiskit/primitives/containers/bit_array.py

Co-authored-by: Ian Hincks <ian.hincks@gmail.com>

* docstring ticks (BitArray.postselect())

Co-authored-by: Ian Hincks <ian.hincks@gmail.com>

* Simpler tests for BitArray.postselect

* lint

* add release note

* check postselect() arg lengths match

* fix postselect tests

- fix bugs with checking that ValueError is raised.
- addtionally run all tests on a "flat" data input

* lint

* Fix type-hint

We immediately check the lengths of these args, so they should be Sequences, not Iterables.

* remove spurious print()

* lint

* lint

* use bitwise operations for faster postselect

- Also added support for negative indices
- Also updated tests

* remove spurious print()

* end final line of release note

* try to fix docstring formatting

* fix bitarray test assertion

Co-authored-by: Takashi Imamichi <31178928+t-imamichi@users.noreply.github.com>

* disallow postselect positional kwarg

Co-authored-by: Takashi Imamichi <31178928+t-imamichi@users.noreply.github.com>

* fix numpy dtype args

* Simpler kwarg: "assume_unique"

* lint (line too long)

* simplification: remove assume_unique kwarg

* improve misleading comment

* raise IndexError if indices out of range

- Change ValueError to IndexError.
- Add check for out-of-range negative indices.
- Simplify use of mod
- Update test conditions (include checks for off-by-one errors)

* lint

* add negative-contradiction test

* Update docstring with IndexErrors

* lint

* change slice_bits error from ValueError to IndexError

* update slice_bits test to use IndexError

* change ValueError to IndexError in slice_shots

also update tests for this error

* update error type in slice_shots docstring

* Revert ValueError to IndexError changes

Reverting these changes as they will instead be made in a separa... (continued)

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