| beam.io.ReadTextFile('/path/to/files') words = lines | beam.FlatMap(lambda line: re.findall('\w+', line)) The "pipe" operator applies a transformation (on the right) to a PCollection, reminiscent of bash. This will be applied to each line, resulting in a PCollection of words.
Beam Java Beam Python Execution Execution Cloud Dataflow Execution Apache Gear- pump Apache Apex Runner Distributed processing environments that understand the runner API graph and how to execute the Beam model primitives.
◦ Unbounded in volume ◦ Out of order ◦ Arbitrarily delayed • The Beam model separates concerns of: ◦ What is being computed? ◦ Where in event time? ◦ When in processing time? ◦ How do refinements happen?