Multiprocessing.pool API Extension - Pass Data to Workers w/o Globals

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2018-09-28.20:04:13.460>
labels = ['3.8', 'type-feature', 'library']
title = 'Multiprocessing.pool API Extension - Pass Data to Workers w/o Globals'
updated_at = <Date 2018-10-05.18:45:39.587>
user = 'https://github.com/seanharr11'

bugs.python.org fields:

activity = <Date 2018-10-05.18:45:39.587>
actor = 'terry.reedy'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2018-09-28.20:04:13.460>
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']