* DOFArray: Pickle/unpickle tags

* make unpickling backwards compatible

* use dict instead

* add test

* fix axes tags

* make sure to always save tags

* fix axes_tags

* axes_tags fixes and various asserts

* support empty DOFArray

* Simplify tag storing

Co-authored-by: Alex Fikl <alexfikl@gmail.com>

* call freeze() for metadata inference

* add warning for unpickling backwards mode

* add link to comment

* test with Pytato actx too

* skip test_flatten_unflatten with pytato actx

Co-authored-by: Alex Fikl <alexfikl@gmail.com>

Andreas Klöckner authored 3 years ago and Andreas Klöckner committed 3 years ago

Make separate PolynomialWarpAndBlend{2,3}DGroupFactory, deprecate PolynomialWarpAndBlendGroupFactory

* add unflatten_like

* add tests for unflatten_like

* add more checks to unflatten_like

* add docs to motivate unflatten_like

* Add another clarifying sentence to unflatten_like docstring

Co-authored-by: Andreas Klöckner <inform@tiker.net>

- actx.np.linalg.norms(DOFArray) is deprecated (uses 2D arrays
  internally, which, in strict numpy compatibility, would compute a
  matrix norm)
- Bring back dof_array.flat_norm
- Take actx.np.linalg.norm and flat_norm recursively over array containers

* it now just returns None by default and is not recursive
* added a `get_container_context_recursively` for that
* stopped using it in freeze/thaw/flatten to avoid traversals