pyflink.datastream.data_stream.KeyedStream.window

KeyedStream.window(window_assigner: pyflink.datastream.window.WindowAssigner) → pyflink.datastream.data_stream.WindowedStream

Windows this data stream to a WindowedStream, which evaluates windows over a key grouped stream. Elements are put into windows by a WindowAssigner. The grouping of elements is done both by key and by window.

A Trigger can be defined to specify when windows are evaluated. However, WindowAssigners have a default Trigger that is used if a Trigger is not specified.

Parameters

window_assigner – The WindowAssigner that assigns elements to windows.

Returns

The trigger windows data stream.