terryjreedy
commented
6 years ago Quoting the PR:
Proposing a new kwarg in the __init__() method of multiprocessing.Pool named expect_initret.
This kwarg defaults to False. When set to True, the return value of the initializer function is passed to the function we are applying (i.e. func in Pool.map(func, ls)), as a kwarg named initret.
This PR includes thorough test coverage, and provides backwards compatibility (at least in Python3.x).
See blog post https://thelaziestprogrammer.com/python/multiprocessing-pool-expect-initret-proposal for example use cases, as well as an initial defense for why this makes the multiprocessing.Pool API more approachable, to more Python end-users, and augments the library.
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields: ```python assignee = None closed_at = None created_at =
labels = ['3.8', 'type-feature', 'library']
title = 'Multiprocessing.pool API Extension - Pass Data to Workers w/o Globals'
updated_at =
user = 'https://github.com/seanharr11'
```
bugs.python.org fields:
```python
activity =
actor = 'terry.reedy'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation =
creator = 'seanharr11'
dependencies = []
files = []
hgrepos = []
issue_num = 34837
keywords = ['patch']
message_count = 2.0
messages = ['327168', '327169']
nosy_count = 4.0
nosy_names = ['terry.reedy', 'pitrou', 'davin', 'seanharr11']
pr_nums = ['9627']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue34837'
versions = ['Python 3.8']
```