Add check for a queue emptiness

Bakhtiyor Ruziev · Bakhtiyor · commit 37328cc3dea7 · 2019-10-09T22:08:51.000+03:00
diff --git a/data_structures/queue/queue.py b/data_structures/queue/queue.py
@@ -17,6 +17,8 @@ def put(self, item):
         self.length += 1
 
     def get(self):
+        if self.length <= 0:
+            return
         self.length -= 1
         de_queued = self.entries[self.front]
         self.entries = self.entries[1:]
