Frame filter

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filter(self, predicate)

Select all rows which satisfy a predicate.

Parameters:

predicate : function

UDF which evaluates a row to a boolean; rows that answer False are dropped from the Frame

Modifies the current frame to save defined rows and delete everything else.

Examples

For this example, my_frame is a Frame object with lots of data for the attributes of lizards, frogs, and snakes. Get rid of everything, except information about lizards and frogs:

>>> def my_filter(row):
... return row['animal_type'] == 'lizard' or
... row['animal_type'] == "frog"

>>> my_frame.filter(my_filter)

The frame now only has data about lizards and frogs.

More information on a UDF can be found at Python User Functions.