Circle class using OOP

Author: AstinCHOI

5장_객체_지향_설계/ShapeClass.py

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+import math
+
+
+class Point:
+    def __init__(self, x = 0, y = 0):
+        self.x = x # 데이터 속성(attribute)
+        self.y = y
+    
+    def distance_from_origin(self): # 메서드 속성
+        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)
+
+
+class Circle(Point):
+    def __init__(self, radius, x=0, y=0):
+        super().__init__(x,y) # 생성 및 초기화
+        self.radius = radius
+
+    def edge_distance_from_origin(self):
+        return abs(self.distance_from_origin() - self.radius)
+    
+    def area(self):
+        return math.pi*(self.radius**2)
+    
+    def circumference(self):
+        return 2*math.pi*self.radius
+    
+    def __eq__(self, other):
+        return self.radius == other.radius and super().__eq__(other)
+    
+    def __repr__(self):
+        return "circle ({0.radius!r}, {0.x!r})".format(self)
+    
+    def __str__(self):
+        return repr(self)
+
+
+# >>> import ShapeClass as shape
+# >>> a = shape.Point(3,4)
+# >>> a
+# point (3, 4)
+# >>> repr(a)
+# 'point (3, 4)'
+# >>> str(a)
+# '(3, 4)'
+# >>> a.distance_from_origin()
+# 5.0
+# >>> c = shape.Circle(3,2,1)
+# >>> c
+# circle (3, 2)
+# >>> repr(c)
+# 'circle (3, 2)'
+# >>> str(c)
+# 'circle (3, 2)'
+# >>> c.circumference()
+# 18.84955592153876
+# >>> c.edge_distance_from_origin()
+# 0.7639320225002102