Python Poplib錯誤

Question

這是代碼

import poplib
from email import parser

pop_conn = poplib.POP3_SSL('pop.gmail.com')
pop_conn.user('user@gmail.com')
pop_conn.pass_('password')
messages = [pop_conn.retr(i) for i in range(1, len(pop_conn.list()[1]) + 1)]
messages = ["\n".join(mssg[1]) for mssg in messages]
messages = [parser.Parser().parsestr(mssg) for mssg in messages]
for message in messages:
    print(message)

當到達第8行時（ messages = ["\\n".join(mssg[1]) for mssg in messages] ）

它說：

TypeError: sequence item 0: expected str instance, bytes found

有人知道我在做什么錯嗎？

Answer 1

使用bytes.decode將bytes對象轉換為字符串：

messages = ["\n".join(m.decode() for m in mssg[1]) for mssg in messages]