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https://issues.apache.org/jira/browse/BEAM-7746?focusedWorklogId=278046&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-278046
]
ASF GitHub Bot logged work on BEAM-7746:
----------------------------------------
Author: ASF GitHub Bot
Created on: 17/Jul/19 08:04
Start Date: 17/Jul/19 08:04
Worklog Time Spent: 10m
Work Description: robertwb commented on pull request #9056: [BEAM-7746]
Add python type hints
URL: https://github.com/apache/beam/pull/9056#discussion_r304268742
##########
File path: sdks/python/apache_beam/examples/wordcount.py
##########
@@ -85,31 +98,66 @@ def run(argv=None):
pipeline_options.view_as(SetupOptions).save_main_session = True
p = beam.Pipeline(options=pipeline_options)
+ reveal_type(p)
+
+ _read = ReadFromText(known_args.input)
+ reveal_type(_read)
+
+ read = 'read' >> _read
+ reveal_type(read)
+
# Read the text file[pattern] into a PCollection.
- lines = p | 'read' >> ReadFromText(known_args.input)
+ lines = p | read
+ reveal_type(lines) # PCollection[unicode*]
+
+ def make_ones(x):
+ # type: (T) -> Tuple[T, int]
Review comment:
That's really unfortunate... I'd have expected more of mypy :(. In that case
our own inference (which does handle this) is all the more important.
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Issue Time Tracking
-------------------
Worklog Id: (was: 278046)
Time Spent: 0.5h (was: 20m)
> 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
> Priority: Major
> Time Spent: 0.5h
> 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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