Minor bug fixes.

[Zshan0]

There were a few minor bugs that went unnoticed, a few more of them persist that require discussion that can be continued on this thread before it is merged with the main branch.

[WrathfulSpatula]

@Zshan0 This is great! My only particular point to add is that dump_callback() and dump_ids_callback() should not have the self parameter, because they are specifically C callbacks, called from the Python code by the underlying C++ Qrack library itself, believe it or not. If you could revert just those two self parameters, we'll get this right in!

[Zshan0]

I'm suggesting a few changes that could be discussed and bundled together in this PR itself.

1. Wildcard imports are not recommended from libraries, this is a minor fix that could be issued as a good first issue.
2. I'm not fully sure, but I believe that permutation_expectation here must return the value result. The same applies for joint_ensemble_probability. If that is the correct behavior, I'll just add it to this PR.

Another suggestion that I would make is that the upcoming unitary hack is a good opportunity to add tests/CI for pyqrack :D

[WrathfulSpatula]

@Zshan0 Correct, permutation_expectation() and joint_ensemble_probability() should return their result, after the shared C library interface is polled for exception. As for the ctypes wildcard import, you can go ahead and import the explicit ctypes native type classes that we use, if you like.

[Zshan0]

I can do import ctypes and make changes from c_ulonglong to ctypes.c_ulonlong rather than importing all the required classes, whatever you think would be better :)

[WrathfulSpatula]

Honestly, you're probably more aware of Python standards than I am, so I leave the choice for ctypes to your best judgement! (I'm basically a C++ developer providing an interface, in this case.)

[WrathfulSpatula]

LGTM! Thanks again! Feel free to merge, whenever you're ready! (I'll likely iterate a release with your changes, sometime today, because that's the precedent PyQrack maintains for support!)