Seems like obj.fillna(method="ffill") is redundant with obj.ffill(). If that is accurate, we should deprecate the method keyword in fillna.
Comment From: jreback
+1 this is duplicative
Comment From: winedarksea
-1 this required lots of code changes for no clear benefit to pandas don't break stuff without clear benefit is my vote
Comment From: pierre-haessig
I just came across this deprecation, a little late in the party. And I really don't get it: what's the point of fillna() if the two possible keyword values(*) are deprecated? In fact I had never heard of ffill() and bfill() before and I agree that there is an API redundancy, but I would put the blame on ffill() and bfill() instead.
(*) the None value is also possible, but I don't know what it is supposed to do...