[
https://issues.apache.org/jira/browse/BEAM-6988?focusedWorklogId=242708&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-242708
]
ASF GitHub Bot logged work on BEAM-6988:
----------------------------------------
Author: ASF GitHub Bot
Created on: 15/May/19 17:42
Start Date: 15/May/19 17:42
Worklog Time Spent: 10m
Work Description: udim commented on issue #8530: [BEAM-6988] solved
problem related to updates of the str object
URL: https://github.com/apache/beam/pull/8530#issuecomment-492753407
`fn.__objclass__` is a partial type hint for some builtin methods, since it
doesn't provide type information to all possible arguments.
In Py3.7:
```py
>>> inspect.signature(str.isupper).bind('a') # okay
<BoundArguments (self='a')>
>>> inspect.signature(str.strip).bind('a') # missing optional arg chars
<BoundArguments (self='a')>
>>> inspect.signature(str.join).bind('a') # missing required arg iterable
TypeError: missing a required argument: 'iterable'
```
We can avoid the TypeError above by using `bind_partial()`, but the type
information for arguments beyond `self` will be missing from all builtins.
Hence, these are partial type hints.
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Issue Time Tracking
-------------------
Worklog Id: (was: 242708)
Time Spent: 3h 10m (was: 3h)
> TypeHints Py3 Error: test_non_function
> (apache_beam.typehints.typed_pipeline_test.MainInputTest) Fails on Python 3.7+
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: BEAM-6988
> URL: https://issues.apache.org/jira/browse/BEAM-6988
> Project: Beam
> Issue Type: Sub-task
> Components: sdk-py-core
> Reporter: Robbe
> Assignee: niklas Hansson
> Priority: Major
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> {noformat}
> Traceback (most recent call last):
> File
> "/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python_Commit/src/sdks/python/test-suites/tox/py37/build/srcs/sdks/python/apache_beam/typehints/typed_pipeline_test.py",
> line 53, in test_non_function
> result = ['xa', 'bbx', 'xcx'] | beam.Map(str.strip, 'x')
> File
> "/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python_Commit/src/sdks/python/test-suites/tox/py37/build/srcs/sdks/python/apache_beam/transforms/ptransform.py",
> line 510, in _ror_
> result = p.apply(self, pvalueish, label)
> File
> "/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python_Commit/src/sdks/python/test-suites/tox/py37/build/srcs/sdks/python/apache_beam/pipeline.py",
> line 514, in apply
> transform.type_check_inputs(pvalueish)
> File
> "/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python_Commit/src/sdks/python/test-suites/tox/py37/build/srcs/sdks/python/apache_beam/transforms/ptransform.py",
> line 753, in type_check_inputs
> hints = getcallargs_forhints(argspec_fn, *type_hints[0], **type_hints[1])
> File
> "/home/jenkins/jenkins-slave/workspace/beam_PreCommit_Python_Commit/src/sdks/python/test-suites/tox/py37/build/srcs/sdks/python/apache_beam/typehints/decorators.py",
> line 283, in getcallargs_forhints
> raise TypeCheckError(e)
> apache_beam.typehints.decorators.TypeCheckError: strip() missing 1 required
> positional argument: 'chars'{noformat}
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