txt = '我是字符串'

txt_encode = txt.encode()

print(txt)

# 我是字符串

print(txt_encode)

# b'\xe6\x88\x91\xe6\x98\xaf\xe5\xad\x97\xe7\xac\xa6\xe4\xb8\xb2'

print(type(txt))

# <class 'str'>

print(type(txt_encode))

# <class 'bytes'>

txt_copy = txt_encode.decode( )

print(txt_copy)

# 我是字符串

print(type(txt_copy))

# <class 'str'>

# str->bytes encode

# bytes->str decode