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============== DataStream API

DataStream programs in Flink are regular programs that implement transformations on data streams (e.g., filtering, updating state, defining windows, aggregating). The data streams are initially created from various sources (e.g., message queues, socket streams, files). Results are returned via sinks, which may for example write the data to files, or to standard output (for example the command line terminal).

Python DataStream API is a Python version of DataStream API which allows Python users to write Python DataStream API jobs.

.. toctree:: :maxdepth: 2

data_types
operators
process_function