[問題] str.format()

[left (881 forever)]

問個白癡問題
這是書本上的範例
在下面Point這個class裡，有定義一個 __repr__()
如下:


def __repr__(self):
        return "Point({0.x!r}, {0.y!r})".format(self)


請問裡面的!r是啥意思阿?



class Point:

    def __init__(self, x=0, y=0):

        self.x = x
        self.y = y


    def distance_from_origin(self):
        return math.hypot(self.x, self.y)


    def __eq__(self, other):
        return self.x == other.x and self.y == other.y


    def __repr__(self):
        return "Point({0.x!r}, {0.y!r})".format(self)


    def __str__(self):
        return "({0.x!r}, {0.y!r})".format(self)

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→ walelile: repr(0.x) repr(0.y)
→ buganini: https://www.python.org/dev/peps/pep-3101/
→ buganini: google://python format "!r"