Python str和bytes的相互转换

str0 = "abc"
a = bytes(str0, "utf-8")  
print(type(str0),str0)
print(type(a),a)   
print("-----------------------") 
  
c = bytes([97,98,99,100])  
print(type(c),c)
str1= str(c,"utf-8")  
print(type(str1),str1)
输出：

<class "str"> abc
<class "bytes"> b"abc"
-----------------------
<class "bytes"> b"abcd"
<class "str"> abcd