Python中如何接收邮件？

import imaplib import email from email.header import decode_header  # 连接到邮件服务器 mail = imaplib.IMAP4_SSL('imap.gmail.com') mail.login('your_email@gmail.com', 'your_password') mail.select('inbox')  # 搜索所有邮件 _, message_numbers = mail.search(None, 'ALL')  for num in message_numbers[0].split():     _, msg = mail.fetch(num, '(RFC822)')     for response_part in msg:         if isinstance(response_part, tuple):             message = email.message_from_bytes(response_part[1])              # 解码邮件主题             subject, encoding = decode_header(message['Subject'])[0]             if isinstance(subject, bytes):                 subject = subject.decode(encoding or 'utf-8')              print('Subject:', subject)              # 解码发件人             from_, encoding = decode_header(message.get('From'))[0]             if isinstance(from_, bytes):                 from_ = from_.decode(encoding or 'utf-8')             print('From:', from_)              # 如果邮件是多部分的，遍历所有部分             if message.is_multipart():                 for part in message.walk():                     content_type = part.get_content_type()                     content_disposition = str(part.get('Content-Disposition'))                     if content_type == 'text/plain' and 'attachment' not in content_disposition:                         body = part.get_payload(decode=True).decode()                         print('Body:', body)             else:                 body = message.get_payload(decode=True).decode()                 print('Body:', body)  mail.close() mail.logout()