DEPR: seems numpy is deprecating object array bool comparison w/nan in 1.9

[jreback]

related:
#8509

#5283
numpy/numpy#4685

[jreback]

cc @unutbu

[unutbu]

If catch_warnings were to be used to suppress the warning, I wish there was a mechanism to remind us to remove the catch_warnings when it is no longer needed...

[jreback]

@unutbu

I think we need to write an elementwise comparer for the this part
positive is you can do the expression all at once (and maybe the nan checking in-line)

[unutbu]

@jreback: Sorry, I don't understand what that entails. Are you thinking of using Cython? (that's not something I know much about.)

[jreback]

I wrote that before seeing your comment in the other issue

filtering warning is ok here I think