title: python can't send attachment files through email
body: <p>I have the following code which works fine, but it doesn't send the attachment files.</p>
  
  <pre><code>import smtplib
  import os
  from email.mime.multipart import MIMEMultipart
  from email.mime.text import MIMEText
  from email.MIMEBase import MIMEBase
  from email import Encoders
  
  msg=MIMEMultipart()
  
  def mymail(address,body,format,mylist=None):
  
      msg['To']=address
      msg['From']='ggous1@gmail.com'
      if format=='txt':
          text_msg=MIMEText(body,'plain')
      elif format=='html':
          text_msg=MIMEText(body,'html')
      msg.attach(text_msg)
      if mylist is not None:
          mylist=[]
          fn=[]
          for f in range(len(mylist)):
              direct=os.getcwd()
              os.chdir(direct)
              part=MIMEBase('application','octet-stream')
              part.set_payload(open(mylist[f],'rb').read())
              Encoders.encode_base64(part)
              part.add_header('Content-Disposition', 'attachment; filename="%s"' % os.path.basename(mylist[f])) 
              fn.append(part)
              msg.attach(fn)
  
      srv=smtplib.SMTP('smtp.gmail.com')
      srv.set_debuglevel(1)
      srv.ehlo()
      srv.starttls()
      srv.ehlo()
      srv.login('username','pass')
      srv.sendmail(msg['From'],msg['To'],msg.as_string())
      srv.quit()
  
  if __name__=="__main__":
      address=raw_input('Enter an address to send email in the form "name@host.com" ')
      body=raw_input('Enter the contents of the email')
      format=raw_input('The format is txt or html?')
      question=raw_input('Do you have any files to attach?Yes or No?')
      mylist=[]
      if question=='Yes' or question=='yes':
          fn=raw_input('Enter filename')
          mylist.append(fn)
  
      mymail(address,body,format,mylist)
  </code></pre>
  
  <p>Am I not using MIMEBase right, or do I have an error in my code?</p>
  
  <p>UPDATE------------------------</p>
  
  <pre><code> if mylist is not None:
          mylist=[]
          fn=[]
          for f in range(len(mylist)):
              direct=os.getcwd()
              os.chdir(direct)
              fn[f]=open(mylist[f],'r')             
              part=msg.attach(MIMEApplication(fn[f]))
              mylist.append(part)
  </code></pre>