aggiunge esercizio 38

lab37.py

@@ -0,0 +1,27 @@
+class QueueError(Exception):
+    pass
+
+
+class Queue:
+    def __init__(self):
+        self.__queue_list = []
+
+    def put(self, val):
+        self.__queue_list.insert(0, val)
+
+    def get(self):
+        if len(self.__queue_list) < 1:
+            raise QueueError("Errore di coda")
+        return self.__queue_list.pop()
+
+que = Queue()
+
+que.put(1)
+que.put("cane")
+que.put(False)
+
+try:
+    for i in range(4):
+        print(que.get())
+except:
+    print("Errore di coda")

lab38.py

@@ -0,0 +1,34 @@
+class QueueError(Exception):
+    pass
+
+class Queue:
+    def __init__(self):
+        self.__queue_list = []
+
+    def put(self, val):
+        self.__queue_list.insert(0, val)
+
+    def get(self):
+        if len(self.__queue_list) < 1:
+            raise QueueError("Errore di coda")
+        return self.__queue_list.pop()
+
+class SuperQueue(Queue):
+    def __init__(self):
+        Queue.__init__(self)
+
+    def isempty(self):
+        return len(self._Queue__queue_list) == 0
+
+
+que = SuperQueue()
+
+que.put(1)
+que.put("cane")
+que.put(False)
+
+for i in range(4):
+    if not que.isempty():
+        print(que.get())
+    else:
+        print("Coda vuota")