diff --git a/data_structures/queue/queue_on_list.py b/data_structures/queue/queue_on_list.py
index 4d69461af66a..88094c9207fe 100644
--- a/data_structures/queue/queue_on_list.py
+++ b/data_structures/queue/queue_on_list.py
@@ -1,52 +1,52 @@
-"""Queue represented by a Python list"""
-
-
-class Queue:
-    def __init__(self):
-        self.entries = []
-        self.length = 0
-        self.front = 0
-
-    def __str__(self):
-        printed = "<" + str(self.entries)[1:-1] + ">"
-        return printed
-
-    """Enqueues {@code item}
-    @param item
-        item to enqueue"""
-
-    def put(self, item):
-        self.entries.append(item)
-        self.length = self.length + 1
-
-    """Dequeues {@code item}
-    @requirement: |self.length| > 0
-    @return dequeued
-        item that was dequeued"""
-
-    def get(self):
-        self.length = self.length - 1
-        dequeued = self.entries[self.front]
-        # self.front-=1
-        # self.entries = self.entries[self.front:]
-        self.entries = self.entries[1:]
-        return dequeued
-
-    """Rotates the queue {@code rotation} times
-    @param rotation
-        number of times to rotate queue"""
-
-    def rotate(self, rotation):
-        for i in range(rotation):
-            self.put(self.get())
-
-    """Enqueues {@code item}
-    @return item at front of self.entries"""
-
-    def front(self):
-        return self.entries[0]
-
-    """Returns the length of this.entries"""
-
-    def size(self):
-        return self.length
+"""Queue represented by a Python list"""
+
+
+class Queue:
+    def __init__(self):
+        self.entries = []
+        self.length = 0
+        self.front = 0
+
+    def __str__(self):
+        printed = "<" + str(self.entries)[1:-1] + ">"
+        return printed
+
+    """Enqueues {@code item}
+    @param item
+        item to enqueue"""
+
+    def put(self, item):
+        self.entries.append(item)
+        self.length = self.length + 1
+
+    """Dequeues {@code item}
+    @requirement: |self.length| > 0
+    @return dequeued
+        item that was dequeued"""
+
+    def get(self):
+        self.length = self.length - 1
+        dequeued = self.entries[self.front]
+        # self.front-=1
+        # self.entries = self.entries[self.front:]
+        self.entries = self.entries[1:]
+        return dequeued
+
+    """Rotates the queue {@code rotation} times
+    @param rotation
+        number of times to rotate queue"""
+
+    def rotate(self, rotation):
+        for i in range(rotation):
+            self.put(self.get())
+
+    """Enqueues {@code item}
+    @return item at front of self.entries"""
+
+    def first(self):
+        return self.entries[0]
+
+    """Returns the length of this.entries"""
+
+    def size(self):
+        return self.length