Fix mypy type checking tests failure in ds.merge#3690
Merged
dcherian merged 2 commits intopydata:masterfrom Jan 13, 2020
TomNicholas:mypy_fix
Merged
Fix mypy type checking tests failure in ds.merge#3690dcherian merged 2 commits intopydata:masterfrom TomNicholas:mypy_fix
dcherian merged 2 commits intopydata:masterfrom
TomNicholas:mypy_fix
