str-bytes

PS: 这个坑踩了无数遍，填了它😀😜😜

python-字节型数据与字符串的转换

bytes to str

• str(bytes, encoding="utf-8")

    In [4]: type(b)  
    Out[4]: bytes  
  
    In [7]: c = str(b, encoding="utf-8")  
  
    In [8]: type(c)  
    Out[8]: str  

• bytes.decode(bytes)

    In [14]: type(z)  
    Out[14]: bytes  
  
    In [15]: m = bytes.decode(z)  
  
    In [16]: type(m)  
    Out[16]: str  

• repr(bytes)

    In [7]: a = b"12345"   
  
    In [8]: type(a)   
    Out[8]: bytes   
  
    In [9]: b = repr(a)   
  
    In [10]: type(b)   
    Out[10]: str   
  
    In [11]: print(b)   
    b'12345'   

str to bytes

• bytes(string, encoding='utf-8')

    In [2]: type(a)  
    Out[2]: str  
  
    In [3]: b = bytes(a, encoding="utf-8")  
  
    In [4]: type(b)  
    Out[4]: bytes  

• str.encode(str)

    In [13]: type(a)  
    Out[13]: str  
  
    In [12]: z = str.encode(a)  
  
    In [14]: type(z)  
    Out[14]: bytes