John Stilley

**WARNING**! NumPy just dropped support for jagged arrays, so we are suddenly stuck with only relic versions of NumPy: * [Ticket](https://github.com/terrapower/armi/issues/1036) * [PR](https://github.com/terrapower/armi/pull/1035) We NEED a long term solution that...

I looked into this back in the day. Aside from not being super easy to do, any pure-python solution I tried immediately caused performance hits, when compared to the uber-fast...

This ticket has re-emerged today. I am happy to see people finally agree with me that it makes sense. Very gratifying. Obviously, there is a backwards compatibility issue here. So...

For future reference, the problem is in our `Blueprint.load()` method: https://github.com/terrapower/armi/blob/48f543859e84428a3edbae5bc0b0b38b7f3110af/armi/reactor/blueprints/__init__.py#L570-L578 We need to inject some custom logic to detect duplicate sub-keys in YAML files. I thought the problem was...

I'll be honest, considering this "bug" is latent in all YAML readers, and in the YAML spec, I'm not pumped about trying to fix this in ARMI. The "solution" is...

As an alternative to changing the behavior of something that is so widely supported in the YAML spec, I propose we just add some documentation to somewhere in the User...

This was closed with: https://github.com/terrapower/armi/pull/1383

One possible solution to this would be to an `ExCore` child to the `Reactor`. Then Pylot could define parameters for the objects in that structure, like we do in so...

@drewejohnson Sorry, this has been open for ages. What are you thinking on this one now? Where are we at?

I have finally started on this ticket. First things first, a huge number of our `Parameter`s are missing units. Or the units are spelled in an inconsistent manner. That is...