Make Python side input tags always key, value pairs instead of depending in index suffixed tag names
Open
core
improvement
P3
python
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- Java
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Description
We suffix side inputs with indices at following location and later use this to sort side inputs.
[https://github.com/apache/beam/blob/master/sdks/python/apache_beam/pipeline.py#L1069](https://github.com/apache/beam/blob/master/sdks/python/apache_beam/pipeline.py#L1069)
This seems brittle. It should be better to always use key, value pairs instead of this.
Imported from Jira [BEAM-9635](https://issues.apache.org/jira/browse/BEAM-9635). Original Jira may contain additional context.
Reported by: chamikara.
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