Make the `cwd` argument to `subprocess.Popen` accept a `PathLike`

[cool-RR]

BPO	28624
Nosy	@ncoghlan, @cool-RR, @berkerpeksag, @sayanchowdhury, @zhangyangyu
PRs	bpo-28624: Add test for subprocess to check that cmd arg supports PathLike #157 [3.6] bpo-28624: Add a test that checks that cwd parameter of Popen() accepts PathLike objects (#157) #323 fix subprocess on Windows (GH-391 backport) #623 [Do Not Merge] Sample of CPython life with blurb. #703 [Do Not Merge] Convert Misc/NEWS so that it is managed by towncrier #552

^{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:

assignee = None
closed_at = <Date 2017-02-26.17:39:04.320>
created_at = <Date 2016-11-06.12:45:19.390>
labels = ['3.7', 'type-feature', 'library']
title = 'Make the `cwd` argument to `subprocess.Popen` accept a `PathLike`'
updated_at = <Date 2017-03-31.16:36:08.862>
user = 'https://github.com/cool-RR'

bugs.python.org fields:

activity = <Date 2017-03-31.16:36:08.862>
actor = 'dstufft'
assignee = 'none'
closed = True
closed_date = <Date 2017-02-26.17:39:04.320>
closer = 'berker.peksag'
components = ['Library (Lib)']
creation = <Date 2016-11-06.12:45:19.390>
creator = 'cool-RR'
dependencies = []
files = []
hgrepos = []
issue_num = 28624
keywords = []
message_count = 4.0
messages = ['288074', '288605', '290377', '290378']
nosy_count = 5.0
nosy_names = ['ncoghlan', 'cool-RR', 'berker.peksag', 'sayanchowdhury', 'xiang.zhang']
pr_nums = ['157', '323', '623', '703', '552']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue28624'
versions = ['Python 3.6', 'Python 3.7']

[sayanchowdhury]

I tested and found that the code already works with PathLike. I have created a PR which updates the test and documentation. I think the issue can be in Windows.

[berkerpeksag]

Thanks for the patch, Sayan!

[berkerpeksag]

New changeset 6b81003 by Berker Peksag in branch '3.6':
bpo-28624: Add a test that checks that cwd parameter of Popen() accepts PathLike objects (#157) (#323)
6b81003

[berkerpeksag]

New changeset d5c11f7 by Berker Peksag (Sayan Chowdhury) in branch 'master':
bpo-28624: Add a test that checks that cwd parameter of Popen() accepts PathLike objects (#157)
d5c11f7