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https://issues.apache.org/jira/browse/BEAM-10900?focusedWorklogId=484817&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-484817
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ASF GitHub Bot logged work on BEAM-10900:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 15/Sep/20 23:30
            Start Date: 15/Sep/20 23:30
    Worklog Time Spent: 10m 
      Work Description: monicadsong commented on a change in pull request 
#12851:
URL: https://github.com/apache/beam/pull/12851#discussion_r489074298



##########
File path: sdks/python/apache_beam/transforms/stats_test.py
##########
@@ -89,6 +90,12 @@ def setUp(self):
           None,
           0.1,
           'assert:global_by_error_with_large_population'),
+      (
+          'numpy_input_data',
+          np.array(range(10)),

Review comment:
       Ah sorry, just saw this. I didn't like the assumption I made about the 
type of elements in the PCollection either, and the use case you mention is 
definitely unsupported with this draft edit but would not alert the user if 
they made that mistake. 




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 484817)
    Time Spent: 2h  (was: 1h 50m)

> stats.ApproximateUniqueCombineFn should handle numpy array
> ----------------------------------------------------------
>
>                 Key: BEAM-10900
>                 URL: https://issues.apache.org/jira/browse/BEAM-10900
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-py-core
>            Reporter: Monica Song
>            Assignee: Monica Song
>            Priority: P1
>          Time Spent: 2h
>  Remaining Estimate: 0h
>
> stats.ApproximateUniqueCombineFn uses DeterministicFastPrimitivesCoder to 
> encode input data. DeterministicFastPrimitivesCoder only accepts python data 
> types and iterables, so numpy data types throw an error. 



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