Dropping non-finite entries
I have been looking for a solution for this for a long time. I tried the ideas in the following threads (with the latest Pandas):
1. [Keep finite entries only in Pandas](http://stackoverflow.com/questions/22799208/keep-finite-entries-only-in-pandas)
2. [Row filtering so that we only keep finite entries](http://stackoverflow.com/questions/23921766/row-filtering-so-that-we-only-have-finite-entries-in-a-specific-column?lq=1)

but none of them work. See thread 2 above, and the comments in its only answer to see why.

What is a good way to drop indices (either rows or columns) that meet a specific criteria such as: `"they contain entries that are not finite"`.?
