add description

Author: akgmage

Diff for: Queue/queue.py

@@ -0,0 +1,53 @@
+# Implement Queue Data Structure
+'''
+    This implementation uses a Python list to store the items in the queue. The __init__() method initializes 
+    an empty list. The is_empty() method checks whether the list is empty or not by checking the length of 
+    the list. The enqueue() method adds an item to the back of the queue by appending it to the end of the 
+    list. The dequeue() method removes and returns the item at the front of the queue by using the pop() 
+    method to remove the first item in the list. If the list is empty, the method raises an IndexError. 
+    The peek() method returns the item at the front of the queue without removing it by returning the 
+    first item in the list. If the list is empty, the method raises an IndexError. The size() method 
+    returns the number of items in the list by returning the length of the list.
+'''
+class Queue:
+    def __init__(self):
+        """
+        Initializes an empty queue.
+        """
+        self.items = []
+
+    def is_empty(self):
+        """
+        Returns True if the queue is empty, False otherwise.
+        """
+        return len(self.items) == 0
+
+    def enqueue(self, item):
+        """
+        Adds the given item to the back of the queue.
+        """
+        self.items.append(item)
+
+    def dequeue(self):
+        """
+        Removes and returns the item at the front of the queue.
+        If the queue is empty, raises an IndexError.
+        """
+        if self.is_empty():
+            raise IndexError("Queue is empty")
+        return self.items.pop(0)
+
+    def peek(self):
+        """
+        Returns the item at the front of the queue without removing it.
+        If the queue is empty, raises an IndexError.
+        """
+        if self.is_empty():
+            raise IndexError("Queue is empty")
+        return self.items[0]
+
+    def size(self):
+        """
+        Returns the number of items in the queue.
+        """
+        return len(self.items)