apache / apache/beam

set_index should accept Series and Index instances

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core dataframe dsl improvement P3 python
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Description

Currently our implementation of set_index only supports columns labels, but the actual implementation also allows passing Index or Series instances.

`df.set_index([df.index, df.foo, df['baz']])`

Imported from Jira [BEAM-11711](https://issues.apache.org/jira/browse/BEAM-11711). Original Jira may contain additional context.
Reported by: bhulette.

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