Stacks

Author: codehariom

Stacks /StacksArrays.py

@@ -0,0 +1,49 @@
+class StacksArray:
+
+    def __init__(self):
+        self._data = []
+
+    def __len__(self):
+        return len(self._data)
+
+    def isempty(self):
+        return len(self._data) == 0
+
+    def push(self, e):
+        self._data.append(e)
+
+    def pop(self):
+        if self.isempty():
+            print('Stack is empty')
+            return
+        return self._data.pop()
+
+    def top(self):
+        if self.isempty():
+            print('Stack is empty')
+            return
+        return self._data[-1]
+
+
+S = StacksArray()
+S.push(5)
+S.push(3)
+print(S._data)
+print(len(S))
+print(S.pop())
+print(S.isempty())
+print(S.pop())
+print(S.isempty())
+S.push(7)
+S.push(9)
+print(S.top())
+S.push(4)
+print(len(S))
+print(S.pop())
+S.push(6)
+S.push(8)
+print(S.pop())
+
+
+
+