multiprocessing.Value.value needs to be defined
Open
Nobody has claimed this yet.
- Dominant language
- Python
- Stars
- 5.1k
- Forks
- 2.1k
- Avg merge
- 1d 19h
- Merged PRs (30d)
- 82
Description
The following sample code:
import multiprocessing as mp
x = mp.Value( 'i', 0 )
print( f'{x.value=}' )
x.value = 1
print( f'{x.value=}' )
Produces this output when run:
x.value=0
x.value=1
But mypy complains:
mypy_bug_multiprocessing_value.py:3: error: "SynchronizedBase[Any]" has no attribute "value" [attr-defined]
mypy_bug_multiprocessing_value.py:4: error: "SynchronizedBase[Any]" has no attribute "value" [attr-defined]
mypy_bug_multiprocessing_value.py:5: error: "SynchronizedBase[Any]" has no attribute "value" [attr-defined]
Python version: Python 3.10.9 (tags/v3.10.9:1dd9be6, Dec 6 2022, 20:01:21) [MSC v.1934 64 bit (AMD64)] on win32
mypy version: mypy==1.3.0
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the typeshed stub for multiprocessing.Value and the SynchronizedBase definition referenced in the mypy error. Compare the declared interface with the sample's .value reads and assignment, then add or update the relevant stub coverage and a regression check if the repository has an applicable test pattern. Done means the sample type-checks without attr-defined errors.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- devtools
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 35/100