问如何附加smtplib文件？

EN

import smtplib
msg = 'funny_text'
fromaddr = 'random_mail@gmail.com'
toaddrs  = ['random_mail@gmail.com', 'random_mail@gmail.com']
server = smtplib.SMTP('smtp.gmail.com', 587)
asunto = 'random_subject'
server.starttls()
server.login("login_mail@gmail.com", "great_password")
print('From: ' + fromaddr)
print('To: ' + str(toaddrs))
print('Subject: ' +asunto)
print('Message: ' + msg)
server.sendmail(fromaddr, toaddrs, msg)
server.quit()