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new db57e4ae351 [Docs] Add CHANGES entries for Python UnboundedSource and
Watch (#39579)
db57e4ae351 is described below
commit db57e4ae351bd5169ccf138ccf11a6ad6cc16502
Author: Elia Liu <[email protected]>
AuthorDate: Tue Aug 4 03:16:01 2026 +1000
[Docs] Add CHANGES entries for Python UnboundedSource and Watch (#39579)
* [Docs] Add CHANGES entries for Python UnboundedSource and Watch
Both landed after the 2.75.0 branch was cut and are absent from
release-2.75, so they belong to 2.76.0.
* Update CHANGES.md
---------
Co-authored-by: Yi Hu <[email protected]>
Co-authored-by: tvalentyn <[email protected]>
---
CHANGES.md | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/CHANGES.md b/CHANGES.md
index 076413d2043..bda50ac6cd1 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -76,6 +76,10 @@
* (Python) Added `equal_to_approx`, an `assert_that` matcher that compares
numeric pipeline outputs with a configurable tolerance
([#18028](https://github.com/apache/beam/issues/18028)).
* (Python) `Timestamp` now supports variable subsecond precision, up to
nanoseconds. The portable
`beam:logical_type:timestamp:v1` logical type now maps to Python's
`Timestamp` ([#39344](https://github.com/apache/beam/issues/39344)).
+* (Python) Added `UnboundedSource`, an interface for reading an infinite
stream of records with checkpointing, watermark reporting, and bundle
finalization. Read one with `beam.io.Read`
+ ([#19137](https://github.com/apache/beam/issues/19137)).
+* (Python) Added `Watch`, a transform that polls a growing set of outputs for
each input element, deduplicates outputs across poll rounds, and stops per a
user-supplied termination condition
+ ([#21521](https://github.com/apache/beam/issues/21521)).
* (Python) Added support to analyze core dumps created after python worker
segmentation faults with `pystack` (or `gdb` if installed) using the
`--profiler_agent=coredump` pipeline option.
([#39484](https://github.com/apache/beam/issues/39484)).
## Breaking Changes
