Unittest接口和UI自动化测试框架中的发送邮件服务如何使用？

#coding=utf-8
from email.mime.text import MIMEText
import time
import smtplib
import getpass
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.base import MIMEBase
from email import encoders
import email
import os

def sendmain(file_path,mail_to = 'xxxx@sdsdsd.com'):
    mail_from = 'xxx@126.com' # 发送邮件账号
    f = open(file_path,'rb')
    mail_body=f.read()
    f.close()
    
    #msg = email.MIMEMultipart.MIMEMultipart()
    msg = MIMEMultipart()

    # 构造MIMEBase对象做为文件附件内容并附加到根容器  
    contype = 'application/octet-stream'  
    maintype, subtype = contype.split('/', 1)  
    
    ## 读入文件内容并格式化  
    data = open(file_path, 'rb')
    file_msg = MIMEBase(maintype, subtype)
    file_msg.set_payload(data.read( ))  
    data.close( )  
    encoders.encode_base64(file_msg)
    
    ## 设置附件头  
    basename = os.path.basename(file_path)  
    file_msg.add_header('Content-Disposition',  
                        'attachment', filename = basename)  
    msg.attach(file_msg)  
    print(u'msg 附件添加成功')
    
    msg1 = MIMEText(mail_body,_subtype='html',_charset='utf-8')
    msg.attach(msg1)
    
    if isinstance(mail_to,str):
        msg['To'] = mail_to
    else: 
        msg['To'] = ','.join(mail_to)
    msg['From'] = mail_from
    msg['Subject'] = u'zzzz项目接口自动化测试'
    msg['date']=time.strftime('%Y-%m-%d-%H_%M_%S')
    print(msg['date'])

    smtp = smtplib.SMTP()
    smtp.connect('smtp.126.com')
    smtp.login('xxx@126.com','123456') # 发送邮件账号密码
    smtp.sendmail(mail_from, mail_to, msg.as_string())
    smtp.quit()
    print('email has send out !')

if __name__=='__main__':
    sendmain('../report/2017-08-18-10_18_57_result.html')

    # HTML报告
    now = datetime.datetime.now().strftime('%Y-%m-%d_%H_%M_%S')
    htmlreport = reportpath + "/" + now + r"result.html"
    print("测试报告生成地址：%s"% htmlreport)
    fp = open(htmlreport, "wb")
    runner = HTMLTestRunner.HTMLTestRunner(stream=fp, verbosity=2, title="xxxx项目接口自动化测试报告", description="用例执行情况")
    # 调用add_case函数返回值
    runner.run(all_case)
    fp.close()
    time.sleep(2)
    sendmain(htmlreport, mail_to=['yyyyy@qq.com']) # 填写需要发送给对方邮件账号，用逗号隔开，可写多个