Created on 2020-09-09 17:54 by kaushik.ghose, last changed 2020-09-12 01:25 by terry.reedy. This issue is now closed.
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| msg376651 - (view) | Author: Kaushik G (kaushik.ghose) | Date: 2020-09-09 17:54 | |
a call of the form `subprocess.run([x, y, z])` where one of the elements is a `pathlib.Pat`h fails on windows because the path is not converted to a string as it should. This works fine (as expected) on macOS and Linux. A typical error message is: `TypeError: argument of type 'WindowsPath' is not iterable` |
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| msg376653 - (view) | Author: Eric V. Smith (eric.smith) *  |
Date: 2020-09-09 18:07 | |
Among others, see: issue 41649 issue 31961 In general, I think the consensus is that the caller should convert each argument to a string. It's not subprocess's job to convert each parameter to a string. |
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| msg376654 - (view) | Author: Kaushik G (kaushik.ghose) | Date: 2020-09-09 18:12 | |
Thank you for your response. There are two concerns I have here. 1. Python's promise of being straightforward. In MOST cases pathlib.Path objects do the right thing, casting to a string such that pathlib.Path is a drop in replacement. This exception is unexpected. 2. Cross platform consistency. Looks like this works on macOS and Linux. Why should it fail on Windows? Thanks! |
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| msg376657 - (view) | Author: Eryk Sun (eryksun) *  |
Date: 2020-09-09 19:05 | |
The underlying subprocess.Popen class was updated in 3.8 to support path-like objects in `args` (with shell=False) and `executable` on Windows [1]. This change was not backported to 3.6 and 3.7. --- [1] https://docs.python.org/3/library/subprocess.html#subprocess.Popen |
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| msg376759 - (view) | Author: Terry J. Reedy (terry.reedy) * |
Date: 2020-09-12 01:25 | |
Also, 3.7 only get security patches. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2020-09-12 01:25:43 | terry.reedy | set | nosy:
+ terry.reedy messages: + msg376759 |
| 2020-09-12 01:25:10 | terry.reedy | set | status: open -> closed superseder: Can't pass Path like objects to subprocess api's on Windows. resolution: duplicate stage: resolved |
| 2020-09-09 19:05:06 | eryksun | set | nosy:
+ eryksun messages: + msg376657 |
| 2020-09-09 18:12:26 | kaushik.ghose | set | messages: + msg376654 |
| 2020-09-09 18:07:45 | eric.smith | set | nosy:
+ eric.smith messages: + msg376653 |
| 2020-09-09 17:54:01 | kaushik.ghose | create | |