Add all the A tasks

Task/Abstract-type/Python/abstract-type-1.py

@@ -0,0 +1,13 @@
+class BaseQueue(object):
+    """Abstract/Virtual Class
+    """
+    def __init__(self):
+        self.contents = list()
+        raise NotImplementedError
+    def Enqueue(self, item):
+        raise NotImplementedError
+    def Dequeue(self):
+        raise NotImplementedError
+    def Print_Contents(self):
+        for i in self.contents:
+            print i,

Task/Abstract-type/Python/abstract-type-2.py

@@ -0,0 +1,21 @@
+from abc import ABCMeta, abstractmethod
+
+class BaseQueue():
+    """Abstract Class
+    """
+    __metaclass__ = ABCMeta
+
+    def __init__(self):
+        self.contents = list()
+
+    @abstractmethod
+    def Enqueue(self, item):
+        pass
+
+    @abstractmethod
+    def Dequeue(self):
+        pass
+
+    def Print_Contents(self):
+        for i in self.contents:
+            print i,