computed property.py

Author: progrmoiz

computedproperty.py

@@ -0,0 +1,38 @@
+ng computed property and setting
+
+
+class operators(object):
+    def __getattr__(self, name):
+        if name == 'age':
+            return 40
+        else:
+            raise AttributeError(name)
+
+    def __setattr__(self, name, value):
+        print('set: %s %s' % (name, value))
+        if name == 'age':
+            self.__dict__['_age'] = value
+        else:
+            self.__dict__[name] = value
+
+
+# OR BETTER WAY
+
+
+class properties(object):
+    def getage(self):
+        return 40
+
+    def setage(self, value):
+        self._age = value
+
+    age = property(getage, setage, None, None)
+
+
+if __name__ == '__main__':
+    x, y = operators(), properties()
+    for ins in (x, y):
+        print(ins.age)
+        ins.age = 20
+        print(ins._age)
+