Adding DS functions

Author: ShubhraJain

queuePython.py

@@ -0,0 +1,25 @@
+class queue():
+
+    def __init__(self):
+        self.items = []
+
+    def push(self, value):
+        self.items.append(value)
+        return self.items
+
+    def pop(self):
+        if len(self.items) < 1:
+            print("Queue is empty")
+        else:
+            del self.items[0]
+            return self.items
+
+if __name__ == '__main__':
+    q = queue()
+    print(q.push(1))
+    print(q.push('haha'))
+    print(q.push(3))
+    print(q.pop())
+    print(q.pop())
+    print(q.pop())
+    print(q.pop())

stackPython.py

@@ -0,0 +1,25 @@
+class stack():
+
+    def __init__(self):
+        self.items = []
+
+    def push(self, value):
+        self.items.append(value)
+        return self.items
+
+    def pop(self):
+        if len(self.items) < 1:
+            print("Stack is empty")
+        else:
+            self.items.pop()
+            return self.items
+
+if __name__ == '__main__':
+    st = stack()
+    print(st.push(1))
+    print(st.push('haha'))
+    print(st.push(3))
+    print(st.pop())
+    print(st.pop())
+    print(st.pop())
+    print(st.pop())