API: raise notImplementedError on to_json(orient='table') for a DataFrame with a MultiIndex

[jreback]

xref #15996

[jreback]

@TomAugspurger

I guess should do this for now (unless you can fix :>)

[TomAugspurger]

Yeah, probably best, at least for now...

Let's leave the issue open though, and relabel it as a general "what should the tableschema repr provide when all else fails"

[jreback]

cc @rgbkrk

[codecov]

Codecov Report

Merging #16095 into master will decrease coverage by 50.48%.
The diff coverage is 50%.

@@             Coverage Diff             @@
##           master   #16095       +/-   ##
===========================================
- Coverage   90.84%   40.35%   -50.49%     
===========================================
  Files         159      159               
  Lines       50776    50777        +1     
===========================================
- Hits        46128    20492    -25636     
- Misses       4648    30285    +25637

Flag	Coverage Δ
#multiple	?
#single	40.35% <50%> (-0.01%)	⬇️

Impacted Files	Coverage Δ
pandas/io/json/json.py	17.27% <50%> (-73.01%)	⬇️
pandas/formats/style.py	0% <0%> (-100%)	⬇️
pandas/io/sas/sas_constants.py	0% <0%> (-100%)	⬇️
pandas/json.py	0% <0%> (-100%)	⬇️
pandas/parser.py	0% <0%> (-100%)	⬇️
pandas/tslib.py	0% <0%> (-100%)	⬇️
pandas/io/sas/sas7bdat.py	0% <0%> (-90.67%)	⬇️
pandas/io/sas/sas_xport.py	0% <0%> (-90.28%)	⬇️
pandas/core/tools/numeric.py	10.44% <0%> (-89.56%)	⬇️
pandas/io/json/normalize.py	8.16% <0%> (-88.78%)	⬇️
... and 111 more

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[rgbkrk]

Thanks, seems sensible. This should end up spitting out HTML while also throwing the exception, which should be fine. They'll have to toggle off the table schema mode.