sys.exit
unpacks its argument if it is a 0- or 1-element tuple
#133548
Labels
interpreter-core
(Objects, Python, Grammar, and Parser dirs)
type-bug
An unexpected behavior, bug, or error
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Bug report
Bug description:
The documentation of
sys.exit
says “The optional argument arg can be an integer giving the exit status (defaulting to zero), or another type of object. [...] If another type of object is passed,None
is equivalent to passing zero, and any other object is printed tostderr
and results in an exit code of 1.” This is no longer true for 0- and 1-element tuples in Python 3.12 and later. It acts like the argument is unpacked:sys.exit(())
is treated likesys.exit()
andsys.exit((x,))
is treated likesys.exit(x)
.CPython versions tested on:
3.12, 3.13, CPython main branch
Operating systems tested on:
macOS
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