Fix type union for compatability with python <3.10

[Jean1995]

Execution of panama on Python 3.8 leads to the error

$ panama
Traceback (most recent call last):
  File "/xxx/panama", line 5, in <module>
    from panama.cli import cli
  File "xxx/panama/cli.py", line 6, in <module>
    from .run import run
  File "/xxx/panama/run.py", line 92, in <module>
    primary: int | dict,
TypeError: unsupported operand type(s) for |: 'type' and 'type'

This should be the same issue as here

This is one possible fix for this to ensure compatibility with python versions older than 3.10

[The-Ludwig]

Thanks for the addition. I guess CI fails since you don't have the CORSIKA download password set in your clone of the repository. I invited you to this repo, so you can simply create a branch next time and the tests will run.

Sadly, this won't fix the error since a quick grep -r "|" ./panama reveals, that I also use | in panama/read.py.

I think this package should use modern python. So I think it's better to do something like from __future__ import annotations to get PEP 604 support (unsure if this really does the trick, needs testing). Or just to require python 3.10, which I realize is not the default for most people using Ubuntu's python or the default anaconda python.

Also I should add matrix verification to automatically test for different python versions and macOS/windows also. The tests are very costly though, since CORSIKA7 has to be compiled every time. I have limited runtime on github... When this project is more stable and mature, maybe we can move it to TUDO-APP...

[Jean1995]

I think this package should use modern python. So I think it's better to do something like from __future__ import annotations to get PEP 604 support (unsure if this really does the trick, needs testing). Or just to require python 3.10, which I realize is not the default for most people using Ubuntu's python or the default anaconda python.

I'd rather do something that is compatible with "older" python versions, since I believe many people interested in this package might be stuck with older python versions.

Also I should add matrix verification to automatically test for different python versions and macOS/windows also. The tests are very costly though, since CORSIKA7 has to be compiled every time. I have limited runtime on github... When this project is more stable and mature, maybe we can move it to TUDO-APP...

Not sure what the "requirements" are to move the project to tudo-app, but in the long-term, I would second that idea

[The-Ludwig]

I'd rather do something that is compatible with "older" python versions, since I believe many people interested in this package might be stuck with older python versions.

I agree, from __future__ import annotations does exactly this. Which I added in this #32 separate PR, so the CI actually works.

Edit: BTW, I have a big, upcoming PR #27, which will add a lot more type annotations to make this repository compatible with the sci-kit hep standards. Need to check with them, maybe they also want to adapt this to the sciki-hep organization, which would definitely be beneficial for visibility, but would need a few more maintainers...