ch06

ch06/oop/class.methods.factory.py

@@ -0,0 +1,27 @@
+# oop/class.methods.factory.py
+class Point:
+
+    def __init__(self, x, y):
+        self.x = x
+        self.y = y
+
+    @classmethod
+    def from_tuple(cls, coords):  # cls is Point
+        return cls(*coords)
+
+    @classmethod
+    def from_point(cls, point):  # cls is Point
+        return cls(point.x, point.y)
+
+
+p = Point.from_tuple((3, 7))
+print(p.x, p.y)  # 3 7
+q = Point.from_point(p)
+print(q.x, q.y)  # 3 7
+
+
+"""
+$ python class.methods.factory.py
+3 7
+3 7
+"""