python str与bytes之间的转换

转自：https://www.cnblogs.com/zqifa/p/python-7.html

 1 # bytes object  
 2 b = b"example"
 3 
 4 # str object  
 5 s = "example"  
 6 
 7 # str to bytes  
 8 sb = bytes(s, encoding = "utf8")  
 9 
10 # bytes to str  
11 bs = str(b, encoding = "utf8")  
12 
13 # an alternative method  
14 # str to bytes  
15 sb2 = str.encode(s)  
16 
17 # bytes to str  
18 bs2 = bytes.decode(b)