读取指定邮件并下载附件

#-*- encoding: utf-8 -*-
#-*- encoding: gbk -*-

import getpass, email, sys
from imapclient import IMAPClient
import datetime
import time
import os
#登入指定邮箱服务器
with IMAPClient('imap.139.com',use_uid=True) as server:
    #输入用户名和密码
    server.login(邮箱账户,邮箱密码)
    print('success')
    #查询邮箱中文件夹信息
    listfolders=server.list_folders()
    #查询指定邮箱的邮件信息
    select_info = server.select_folder('INBOX')
    print('%d messages in INBOX' % select_info[b'EXISTS'])
    #查询来至指定账号的邮件
    messages = server.search(['FROM', '157********@163.com'])
    #解码邮件信息
    for uid, message_data in server.fetch(messages, 'RFC822').items():
        email_message = email.message_from_bytes(message_data[b'RFC822'])
        subject = email.header.make_header(email.header.decode_header(email_message['SUBJECT']))
        mail_from = email.header.make_header(email.header.decode_header(email_message['From']))
        date = email.header.decode_header(email_message.get('date'))
        print(date)
        utcstr = date[0][0].replace('+00:00', '')
        print(utcstr)
        try:
            utcdatetime = datetime.datetime.strptime(utcstr, '%a, %d %b %Y %H:%M:%S +0000 (GMT)')
            print(utcdatetime)
            localdatetime = utcdatetime + datetime.timedelta(hours=+8)
            print(localdatetime)
            localtimestamp = localdatetime.timestamp()
            print(localtimestamp)
        except:
            utcdatetime = datetime.datetime.strptime(utcstr, '%a, %d %b %Y %H:%M:%S +0800')
            localtimestamp = utcdatetime.timestamp()
        print(uid,subject,mail_from)
        # print(localtimestamp)
        days = time.strftime("%Y%m%d", time.localtime(localtimestamp))
        if days>=time.strftime("%Y%m%d",time.localtime(time.time()-172800)):
            #提取附件信息
            attachment_files=[]
            for part in email_message.walk():
                file_name = part.get_filename()
                if file_name:
                    h = email.header.Header(file_name)
                    # 对附件名称进行解码
                    dh = email.header.decode_header(h)
                    filename = dh[0][0]
                    if dh[0][1]:
                        # 将附件名称可读化
                        filename = email.header.make_header(email.header.decode_header(str(filename, dh[0][1])))
                        print(filename)
                    # 下载附件
                    data = part.get_payload(decode=True)
                    # 在指定目录下创建文件，注意二进制文件需要用wb模式打开
                    att_file = open(os.getcwd()+ '\\'+str(filename), 'wb')
                    attachment_files.append(filename)
                    att_file.write(data)  # 保存附件
                    att_file.close()
        else:
            print('非最近两天的邮件')