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https://issues.apache.org/jira/browse/BEAM-3981?focusedWorklogId=86755&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-86755
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ASF GitHub Bot logged work on BEAM-3981:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 02/Apr/18 20:37
            Start Date: 02/Apr/18 20:37
    Worklog Time Spent: 10m 
      Work Description: RobbeSneyders commented on a change in pull request 
#4990: [BEAM-3981] Futurize and fix python 2 compatibility for coders subpackage
URL: https://github.com/apache/beam/pull/4990#discussion_r178643580
 
 

 ##########
 File path: sdks/python/apache_beam/coders/coder_impl.py
 ##########
 @@ -278,38 +277,38 @@ def get_estimated_size_and_observables(self, value, 
nested=False):
     return out.get_count(), []
 
   def encode_to_stream(self, value, stream, nested):
-    t = type(value)
-    if t is NoneType:
+    if value is None:
       stream.write_byte(NONE_TYPE)
 
 Review comment:
   This was changed because `is` doesn't check for subclasses. The whole 
future.builtins package depends on subclasses to add compatibility.
   This can however be changed by depending on six again if necessary.

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

    Worklog Id:     (was: 86755)
    Time Spent: 3.5h  (was: 3h 20m)

> Futurize and fix python 2 compatibility for coders package
> ----------------------------------------------------------
>
>                 Key: BEAM-3981
>                 URL: https://issues.apache.org/jira/browse/BEAM-3981
>             Project: Beam
>          Issue Type: Sub-task
>          Components: sdk-py-core
>            Reporter: Robbe
>            Assignee: Ahmet Altay
>            Priority: Major
>          Time Spent: 3.5h
>  Remaining Estimate: 0h
>
> Run automatic conversion with futurize tool on coders subpackage and fix 
> python 2 compatibility. This prepares the subpackage for python 3 support.



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