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https://issues.apache.org/jira/browse/BEAM-7746?focusedWorklogId=279747&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-279747
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ASF GitHub Bot logged work on BEAM-7746:
----------------------------------------
Author: ASF GitHub Bot
Created on: 19/Jul/19 13:36
Start Date: 19/Jul/19 13:36
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_r305359609
##########
File path: sdks/python/apache_beam/typehints/decorators.py
##########
@@ -193,7 +200,7 @@ def __repr__(self):
self.input_types, self.output_types)
-class WithTypeHints(object):
+class WithTypeHints(Generic[InT, OutT]):
Review comment:
(1) is already mostly there, for the user-facing API at least. How much of
(2) is required for (3) and how invasive it is seems to still be an open
question, which this PR is giving good insight to. (Long term, it'd also be
nice to have (2) for development as well.) Given that mypy can't even do
`beam.Map(lambda x: (x, 1))` I think we'll have to rely a lot on (4).
All will be much nicer once we can have python-3 style annotations in the
code itself. We can't do that for our own codebase until Python 2 is LTS only,
but user code could start using it much sooner.
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Issue Time Tracking
-------------------
Worklog Id: (was: 279747)
Time Spent: 4h (was: 3h 50m)
> 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: 4h
> 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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