python - 如何创建交集函数？

Question

我正在制作一个一维间隔，我必须检查自身是否与另一个对象相交。

这是我到目前为止所拥有的:

def __init__(self, lbound, rbound):
    """
    Constructs a new interval given its lower and upper bounds.
    """

    self._lbound = lbound
    self._rbound = rbound

这是我的职责:

def intersects(self, other):
    """
    Returns True if self intersects other and False othewise.
    """

    s1 = set([self._lbound, self._rbound])
    s2 = set([other._lbound, other._rbound])
    if s1.intersection(s2) and s2.intersection(s1):
        return True

问题是这个函数只给出了我想要的一半答案，什么是 检查自身是否与其他相交的更好方法？

Answer 1

您可能想要这样的东西:

def intersects(self, other):
    return (other._lbound < self._lbound < other._rbound or
            other._lbound < self._rbound < other._rbound or
            self._lbound < other._lbound < self._rbound or
            self._lbound < other._rbound < self._rbound)