Gregory P. Smith <[email protected]> added the comment:
We could also be thinking too low level here. We don't have to re-use
returncode for this or do it on POpen itself. This could be done at the
`run()` API level and CompletedProcess could be given state indicating success
or failure of the exec itself.
ex: Add a `capture_oserror=` arg to `run()`.
```
>>> proc = subprocess.run(['foo'], capture_oserror=True)
>>> proc
CompletedProcess(args='foo', oserror=FileNotFoundError(2, 'No such file or
directory'))
>>> if proc.failure:
...
```
Add two properties to CompletedProcess:
```
@property
def success(self):
return bool(self.oserror is None and not self.returncode)
@property
def failure(self):
return bool(self.oserror or self.returncode)
```
to make using that an easy one liner.
Another thing that came up recently was someone wishing CompletedProcess had a
`__bool__()` method. I rejected that as it could break existing code already
testing None vs CompletedProcess via truthiness. But such a desire should be
satisfied with the above .success and .failure properties.
----------
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Python tracker <[email protected]>
<https://bugs.python.org/issue42648>
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