# bytes object  b = b"example"# str object  s = "example"  # str to bytes  sb = bytes(s, encoding = "utf8")  # bytes to str  bs = str(b, encoding = "utf8")  # an alternative method  # str to bytes  sb2 = str.encode(s)  # bytes to str  bs2 = bytes.decode(b)

原文取自：https://www.cnblogs.com/zqifa/p/python-7.html