title: Attach a txt file in Python smtplib
body: <p>I am sending a plain text email as follows:</p>
  
  <pre><code>import smtplib
  from email.mime.multipart import MIMEMultipart
  from email.mime.text import MIMEText
  
  def send_message():
      msg = MIMEMultipart('alternative')
      s = smtplib.SMTP('smtp.sendgrid.net', 587)
      s.login(USERNAME, PASSWORD)
  
      toEmail, fromEmail = to@email.com, from@email.com
      msg['Subject'] = 'subject'
      msg['From'] = fromEmail
      body = 'This is the message'
  
      content = MIMEText(body, 'plain')
      msg.attach(content)
      s.sendmail(fromEmail, toEmail, msg.as_string())
  </code></pre>
  
  <p>In addition to this message, I would like to attach a txt file, 'log_file.txt'. How would I attach a txt file here?</p>