Update 191._number_of_1_bits.md

191._number_of_1_bits.md

@@ -12,18 +12,14 @@ Easy
 
 转成二进制，数1的个数
 
-```
+```python
 class Solution(object):
     def hammingWeight(self, n):
         """
         :type n: int
         :rtype: int
         """
-        count = 0
-        while n > 0:
-            count += n % 2
-            n = n//2
-        return count
+        return bin(n).count('1')
 ```
 
 
@@ -54,7 +50,7 @@ AC代码
 
 
 
-```
+```python
 class Solution(object):
     def hammingWeight(self, n):
         """