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https://issues.apache.org/jira/browse/BEAM-7746?focusedWorklogId=371277&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-371277
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ASF GitHub Bot logged work on BEAM-7746:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 14/Jan/20 01:55
            Start Date: 14/Jan/20 01:55
    Worklog Time Spent: 10m 
      Work Description: chadrik commented on pull request #10367: [BEAM-7746] 
Add python type hints (part 2)
URL: https://github.com/apache/beam/pull/10367#discussion_r366119781
 
 

 ##########
 File path: sdks/python/gen_protos.py
 ##########
 @@ -47,6 +50,164 @@
 ]
 
 
+def generate_urn_files(log, out_dir):
 
 Review comment:
   Actually, I haven't had a chance to look into this yet, but it's quite 
likely that there are no meaningful URN values for types not in the following 
list (from `common_urns`):
   
   ```python
   primitives = StandardPTransforms.Primitives
   deprecated_primitives = StandardPTransforms.DeprecatedPrimitives
   composites = StandardPTransforms.Composites
   combine_components = StandardPTransforms.CombineComponents
   sdf_components = StandardPTransforms.SplittableParDoComponents
   
   side_inputs = StandardSideInputTypes.Enum
   coders = StandardCoders.Enum
   constants = BeamConstants.Constants
   
   environments = StandardEnvironments.Environments
   
   global_windows = GlobalWindowsPayload.Enum.PROPERTIES
   fixed_windows = FixedWindowsPayload.Enum.PROPERTIES
   sliding_windows = SlidingWindowsPayload.Enum.PROPERTIES
   session_windows = SessionsPayload.Enum.PROPERTIES
   
   monitoring_info_specs = MonitoringInfoSpecs.Enum
   monitoring_info_types = MonitoringInfoTypeUrns.Enum
   monitoring_info_labels = MonitoringInfo.MonitoringInfoLabels
   ```
   
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 371277)
    Time Spent: 50h 10m  (was: 50h)

> Add type hints to python code
> -----------------------------
>
>                 Key: BEAM-7746
>                 URL: https://issues.apache.org/jira/browse/BEAM-7746
>             Project: Beam
>          Issue Type: New Feature
>          Components: sdk-py-core
>            Reporter: Chad Dombrova
>            Assignee: Chad Dombrova
>            Priority: Major
>          Time Spent: 50h 10m
>  Remaining Estimate: 0h
>
> As a developer of the beam source code, I would like the code to use pep484 
> type hints so that I can clearly see what types are required, get completion 
> in my IDE, and enforce code correctness via a static analyzer like mypy.
> This may be considered a precursor to BEAM-7060
> Work has been started here:  [https://github.com/apache/beam/pull/9056]
>  
>  



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