[lang-ref] ( init_tuple ) ( python )

def test_init_tuple():
    # ( .. )

    r1 = 1, 2, 3
    r2 = (1, 2, 3)
    r3 = (1,)  # for a 1-tuple, add a trailing comma
    r4 = (1)   # parentheses only: just an int

    assert isinstance(r1, tuple)
    assert isinstance(r2, tuple)
    assert isinstance(r3, tuple)
    assert isinstance(r4, int)