new tasks

Task/Classes/Python/classes.py

@@ -0,0 +1,38 @@
+class MyClass:
+    name2 = 2 # Class attribute
+
+    def __init__(self):
+        """
+        Constructor  (Technically an initializer rather than a true "constructor")
+        """
+        self.name1 = 0 # Instance attribute
+
+    def someMethod(self):
+        """
+        Method
+        """
+        self.name1 = 1
+        MyClass.name2 = 3
+
+
+myclass = MyClass() # class name, invoked as a function is the constructor syntax.
+
+class MyOtherClass:
+    count = 0  # Population of "MyOtherClass" objects
+    def __init__(self, name, gender="Male", age=None):
+        """
+        One initializer required, others are optional (with different defaults)
+        """
+        MyOtherClass.count += 1
+        self.name = name
+        self.gender = gender
+        if age is not None:
+            self.age = age
+    def __del__(self):
+        MyOtherClass.count -= 1
+
+person1 = MyOtherClass("John")
+print person1.name, person1.gender  # "John Male"
+print person1.age                   # Raises AttributeError exception!
+person2 = MyOtherClass("Jane", "Female", 23)
+print person2.name, person2.gender, person2.age  # "Jane Female 23"