[issue24053] Define EXIT_SUCCESS and EXIT_FAILURE constants in sys

[Antoine Pitrou]

Antoine Pitrou added the comment:

> I want people to standardize on status=1 for a generic failure code.

Why that? Multiple error codes can be used by the same program, depending on the kind of error.

> I want discourage people from using computed integer results as exit status.

Ok, that's the first good argument for this feature. Although I would encourage people raise an exception if they want to signify a failure, rather than simply change the error code.

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<http://bugs.python.org/issue24053>
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