Added new queue problem

data_structures/queue/main.py

@@ -0,0 +1,22 @@
+#A basic queue has the following operations:
+#Enqueue: add a new element to the end of the queue.
+#Dequeue: remove the element from the front of the queue and return it.
+class MyQueue(object):
+    def __init__(self):
+        self.stack1 = []
+        self.stack2 = []
+
+    def peek(self):
+        if len(self.stack2) == 0:
+            while len(self.stack1) != 0:
+                self.stack2.append(self.stack1.pop())
+        return self.stack2[-1]
+
+    def pop(self):
+        if len(self.stack2) == 0:
+            while len(self.stack1) != 0:
+                self.stack2.append(self.stack1.pop())
+        self.stack2.pop()
+
+    def put(self, value):
+        self.stack1.append(value)