ENH: Add a few bitarray functions and tests

[matthewturk]

In prep for some other work, here are additional items for bitarrays that make them nicer to use. Tests are added, and I think I got the edge cases.

[matthewturk]

xor is probably not necessary to implement, but it could be.

[matthewturk]

If this passes, could I get a review on it?

[neutrinoceros]

@yt-fido test this please

[matthewturk]

Hmm, this doesn't look like my error, but maybe it is? Did I miss marking something as C++?

+ python tests/nose_runner.py
Traceback (most recent call last):
  File "/home/fido/workspace/yt_py310_git/tests/nose_runner.py", line 9, in <module>
    from yt.config import ytcfg
  File "/home/fido/workspace/yt_py310_git/yt/__init__.py", line 14, in <module>
    from yt.data_objects.api import (
  File "/home/fido/workspace/yt_py310_git/yt/data_objects/api.py", line 1, in <module>
    from . import construction_data_containers as __cdc, selection_objects as __sdc
  File "/home/fido/workspace/yt_py310_git/yt/data_objects/construction_data_containers.py", line 17, in <module>
    from yt.data_objects.selection_objects.data_selection_objects import (
  File "/home/fido/workspace/yt_py310_git/yt/data_objects/selection_objects/__init__.py", line 1, in <module>
    from .boolean_operations import (
  File "/home/fido/workspace/yt_py310_git/yt/data_objects/selection_objects/boolean_operations.py", line 5, in <module>
    from yt.data_objects.selection_objects.data_selection_objects import (
  File "/home/fido/workspace/yt_py310_git/yt/data_objects/selection_objects/data_selection_objects.py", line 31, in <module>
    from yt.utilities.lib.marching_cubes import march_cubes_grid, march_cubes_grid_flux
ImportError: /home/fido/workspace/yt_py310_git/yt/utilities/lib/marching_cubes.cpython-310-x86_64-linux-gnu.so: undefined symbol: _Z13eval_gradientPiPdS0_S0_

[chrishavlin]

Hmm, this doesn't look like my error, but maybe it is? Did I miss marking something as C++?

@matthewturk not your error, that's the flaky build error that happens on the full testsuite frequently. I'm actually not sure why it happens...

[chrishavlin]

@yt-fido test this please

[neutrinoceros]

I'm not sure either, though I suspect a symptom of race condition in the parallel build (possibly related: #4611). It's been happening since we switched jenkins from Python 3.8 to 3.10

[chrishavlin]

Just wanna say I very much appreciate this detailed comment.

[chrishavlin]

you haven't touched these lines, but it looks like another spot where we missed replacing np.random.random with the newer syntax (see #4733). if you want to update this whole function while you're here you'd want to put a

    rng = np.random.default_rng()

up above then replace all the np.random.random calls here with rng.random. We can also do this in a separate PR.

[matthewturk]

I made the change -- thanks!

[matthewturk]

self-merging because the tests pass and I want to get some stuff done before Chris leaves for the day (and this will make that easier)