[Pandas-dev] Chained filtering with lazy evaluation ("where")

[Pietro Battiston]

Il giorno gio, 15/03/2018 alle 12.58 -0500, Tom Augspurger ha scritto:
> FYI, `df.loc[lambda x: x['a'] > 3]` is valid. loc takes a callable,
> and evaluates it with the NDFrame as the first (only) argument.

Aha! I knew one could pass callables, but I had mistakenly assumed the
mechanism was analogous to df.apply(), i.e. accepting rows/elements
rather than the NDFrame itself.

I think I like my solution better... but for sure adding it to pandas
would duplicate an already present functionality.

Thanks (to you and Chris) for the pointer,

Pietro