shaheeramjad opened a new pull request, #37470:
URL: https://github.com/apache/beam/pull/37470
Adds `take(n)` convenience for PCollection: get the first N elements
deterministically without using `Top.Of` + `FlatMap` manually.
## Changes
- **transforms/util.py:** Add `Take` transform and `take(n)` function (uses
Top.Of + FlatMap internally).
- **pvalue.py:** Add `PCollection.take(n)` method.
- **util_test.py:** Add `TakeTest` (function/method syntax, edge cases,
invalid n).
- **CHANGES.md:** New Features entry for take(n).
## Usage
# Function syntax
first_10 = pcoll | beam.take(10)
# Method syntax
first_10 = pcoll.take(10)
Fixes #37429
------------------------
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