python smtplib模块实现发送邮件带附件sendmail

#!/usr/bin/env python 
# -*- coding: UTF-8 -*- 
 
from email.mime.multipart import MIMEMultipart 
from email.mime.base import MIMEBase 
from email.mime.text import MIMEText 
  
from email.utils import COMMASPACE,formatdate 
from email import encoders 
  
import os 
  
def send_mail(server,fro,to,subject,text,files=[]):  
  assert type(server) == dict  
  assert type(to) == list  
  assert type(files) == list  
  
  msg = MIMEMultipart()  
  msg['From'] = fro  
  msg['Subject'] = subject  
  msg['To'] = COMMASPACE.join(to) #COMMASPACE==','  
  msg['Date'] = formatdate(localtime=True)  
  msg.attach(MIMEText(text))  
  
  for f in files:  
    part = MIMEBase('application','octet-stream') #'octet-stream': binary data  
    part.set_payload(open(f,'rb').read())  
    encoders.encode_base64(part)  
    part.add_header('Content-Disposition','attachment; filename="%s"' % os.path.basename(f))  
    msg.attach(part)  
  
  import smtplib  
  smtp = smtplib.SMTP(server['name'],server['port'])  
  smtp.ehlo() 
  smtp.starttls() 
  smtp.ehlo()  
  smtp.login(server['user'],server['passwd'])  
  smtp.sendmail(fro,msg.as_string())  
  smtp.close() 
   
if __name__=='__main__': 
  server = {'name':'mail.server.com','user':'chenxiaowu','passwd':'xxxx','port':25} 
  fro = 'chenxiaowu@163.com' 
  to = ['xxxx@163.com'] 
  subject = '脚本运行提醒' 
  text = 'mail content' 
  files = ['top_category.txt'] 
  send_mail(server,files=files)