feat: Add support for arrayful JSON

[lukasheinrich]

Description

this is a step towards #882 and allows tensor-like values in the spec

we relied a lot on += being concatenatoin for python lists.. but now we first collect a list of lists/arrays and then do tb.concatenate

@phinate

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• Tests are passing
• "WIP" removed from the title of the pull request
• Selected an Assignee for the PR to be responsible for the log summary

Before Merging

For the PR Assignees:

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* Allow for tensor-like values in model spec by building the
modifier builder_data from a list of lists/arrays and then
using tensorlib.concatenate to built up the sample properties.
* Add test for building a model with tensor inputs.

[codecov]

Codecov Report

Merging #1647 (16393e1) into master (fb3a727) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1647   +/-   ##
=======================================
  Coverage   98.03%   98.04%           
=======================================
  Files          63       63           
  Lines        4129     4145   +16     
  Branches      566      572    +6     
=======================================
+ Hits         4048     4064   +16     
  Misses         48       48           
  Partials       33       33           

Flag	Coverage Δ
contrib	24.89% <3.44%> (-0.10%)	⬇️
unittests	97.82% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/pyhf/modifiers/histosys.py	100.00% <100.00%> (ø)
src/pyhf/modifiers/shapesys.py	100.00% <100.00%> (ø)
src/pyhf/modifiers/staterror.py	97.59% <100.00%> (+0.15%)	⬆️
src/pyhf/pdf.py	97.70% <100.00%> (ø)

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[kratsg]

we need tests?

[lukasheinrich]

added!

[lukasheinrich]

Should be good to go @kratsg @matthewfeickert

[matthewfeickert]

LGTM. 👍 Thanks!

[matthewfeickert]

cc @ponyisi as follow up to this Twitter thread. :) This will be in v0.7.0 (the next release).

[matthewfeickert]

I think the CI is hanging because of Issue #1486 unfortunately. I'm happy to merge this in even with if "failing" as it was passing before (but I'm also a person who gets an irrational level of reassurance from seeing everything green so I'm happy to poke it a few more times).

[matthewfeickert]

Oh, I think it is actually Issue #1451. Testing and if so then fixing it now.

[matthewfeickert]

Thanks @lukasheinrich. 👍

[ponyisi]

Thanks for taking care of this!