>>> from interval import interval
>>> interval(1.0, 10.0, 4.1, True)
True
>>> interval(1.0, 10.0, 10.0, True)
True
>>> interval(1.2, 10.4, -2.1, True)
False
>>> interval(1.0, 10.0, 10.0, False)
False
>>> interval(1.2, 10.4, 1.2, False)
False
>>> interval(-11.3, 10.8, 10.8, False)
False
>>> interval(-11.3, 10.8, -3.4, False)
True