在該Python對象列表中創建列表和匯總屬性

Question

我有一類具有屬性長度的對象。 點類有一個（x，y）點，線類有這兩個點並計算2個笛卡爾（x，y）點之間的距離並給出了線的長度。 我想創建一個包含空列表的多邊形類，並從Line類獲取Line值並將其添加到列表中。 任何建議對此將不勝感激！

class Point(object):
    def __init__(self,x,y):
        self.__x=float(x)
        self.__y=float(y)

    @property
    def x(self):
        return self.__x

    @property
    def y(self):
        return self.__y

    @property
    def calculation(self):
        return (self.__x,self.__y)

    def __iter__(self):
        for i in (self.calculation):
            yield i

class Line(object):
    def __init__(self,fromPoint,toPoint):
        self.__fromPoint= tuple(fromPoint)
        self.__toPoint= tuple(toPoint)

    @property
    def length(self):
        return self.__length

    def calc(self):
        self.__length = ((self.__fromPoint[0] - self.__toPoint[0]) + (self.__fromPoint[1] - self.__toPoint[1]))**0.5

class Polygon(object):
    def __init__(self):
        self.__segments= []
        self.__length= float(length)

Answer 1

如果我理解正確，那么您需要的是：

class Polygon(object):
    def __init__(self, *points):
        self.points = points
        self.lines = []

    def create():
        points = self.points
        i = 0
        while i < len(points):
            if i + 1 == len(points):
                line = Line(points[i], points[0])
                self.lines.append(line)
                break
            line = Line(points[i], points[i + 1])
            self.lines.append(line)
            i += 1