python 给多人发送邮件，且将结果添加为附件

import unittest,HTMLTestRunner
import os
def runa():
    path=os.getcwd()
    print(path)
    a=unittest.defaultTestLoader.discover(path,
                                          pattern='login*.py')
    al=unittest.TestSuite()
    al.addTest(a)
    #print(al)
    return al

import os,time
from email.mime.text import MIMEText
from email.header import Header
from email.mime.multipart import MIMEMultipart
from email.utils import formataddr
import smtplib
def lu(path):
    filesn=os.listdir(path)
    filesn.sort(key=lambda x:os.path.getmtime(path+x))
    #luf=path+filesn[-1]
    luf=os.path.join(path+filesn[-1])
    return luf
#print(lu("D:\\study\\python_api_test\\test1204\\"))
def send_out(luf):
    x=open(luf,'rb')
    email=x.read()
    x.close()
    usernames='371933505@qq.com'
    passwd='kclpuvarbapocagj' #此处密码错误，运行时，修改为正确密码
    sender='371933505@qq.com'
    receiver=['371933505@qq.com','1059084854@qq.com']
    info=MIMEMultipart()
    info['From']=Header("测试人：慧慧<%s>"%sender,'utf-8')
    info['To']=Header("请老板们查阅<%s>"%receiver,'utf-8')
    info['Subject']=Header('这是python自动化测试报告...','utf-8')
    info.attach(MIMEText(email,'html','utf-8'))
    attach1=MIMEText(open(luf,'rb').read(),'base64','utf-8')
    attach1['Content-Type']='application/octet-stream'
    attach1["Content-Disposition"]='attachment;filename="result.html"'
    info.attach(attach1)
    smtp=smtplib.SMTP_SSL("smtp.qq.com",465)
    smtp.login(usernames,passwd)
    smtp.sendmail(sender,receiver,info.as_string())
    smtp.quit()
    print("邮件已发出！请注意查收！")

if __name__=="__main__":
    #unittest.TextTestRunner().run(runa())
    htmlrun=unittest.TextTestRunner()
    result=os.path.join(os.getcwd()+"\\result.html") #无result.html，则会自动创建
    print(result)
    a=open(result,'wb')
    htmlrun=HTMLTestRunner.HTMLTestRunner(stream=a,
                                  title='自动化测试结果',
                                  description='具体结果如下：',
                                          verbosity=2)
    htmlrun.run(runa())
    a.close()
    path="D:\\study\\python_api_test\\test1204\\"
    hehe=lu(path)
    send_out(hehe)
======================================================================
小结：
1.python使用了
a=['ab','ee']
b=';'.join(a) #输出结果为ab;ee
2.使用了email中的MIMEMutipart()
附件att1
info=MIMEMutipart()
att1=MIMEText(open('**文件','rb').read(）,'base64','utf-8')
att1=['Content-Type"]='application/octet-stream'
att1=['Content-Disposition']='attachment;filename="可随意命名"'
info.attach(att1)
Text1=MIMEText(open('**文件.html','rb').read())
info.attach(Text1,'html','utf-8')