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bit_operations/count_1s.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# author: bt3gl
+
+
+def count_ones(n: int) -> int:
+        
+        counter = 0
+        
+        while n:
+            
+            if n & 1:
+                counter += 1
+            
+            n >>= 1
+        
+        return counter