olgavrou

based on Sherman–Morrison formula and matrix determinant lemma needs some more testing but getting there

get_weight_from_name python wrapper to work with chain hash

1

Continuation of issue #2474 as discussed [here](https://github.com/VowpalWabbit/vowpal_wabbit/pull/3042#discussion_r646617256)

Add label weight for cb

6

We can set importance weight for simple label, it makes sense to add it to other label types too (e.g. `cb`)

Not sure if this should be marked as a deprecation or not This simple example given by @jackgerrits (and after some discussion with) in the gitter channel for basic usage...

Add automated tests for checking correct state preservation in models

2

## Short description We keep getting bug reports (usually coming from python) where the predictions between a trained vw instance differ if you save the model and then load it...

MacOS CI tests fail occasionally without much info, needs to be investigated and fixed

set use_docker to default to True

10

## Why are these changes needed? ## Related issue number Resolves #1103 Comments: - If we are setting `use_docker` to default to `True` then `docker` should be a required dependency...