leetcode reverse bits python

標籤：

Reverse Bits

Reverse bits of a given 32 bits unsigned integer.

For example, given input 43261596 (represented in binary as 00000010100101000001111010011100), return 964176192 (represented in binary as00111001011110000010100101000000).

Follow up:
If this function is called many times, how would you optimize it?

 

python代碼：

from string import atoi
class Solution:
# @param n, an integer
# @return an integer
     def reverseBits(self, n):
          n_str=bin(n)[2:].zfill(32)[-1::-1]    #利用bin內建函數將n轉換為二進位字串，利用切片刪掉首碼0b，並將其擴充至32位，然後在反轉
          n_int=string.atoi(n_str,2)　　　　   #將翻轉後的二進位字串轉換為整形
          return n_int

 

leetcode reverse bits python