Python を使用してプログラムで電子メールの添付ファイルを送信する方法

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.application import MIMEApplication
from os.path import basename

def send_email_with_attachment(sender, receiver, subject, message, filename):
  """Sends an email with an attachment.

  Args:
    sender: The sender's email address.
    receiver: The receiver's email address.
    subject: The subject of the email.
    message: The text of the email.
    filename: The path to the file to be attached.
  """

  # Create a MIME multipart message
  msg = MIMEMultipart()
  msg['From'] = sender
  msg['To'] = receiver
  msg['Subject'] = subject

  # Add the text of the email
  msg.attach(MIMEText(message))

  # Add the attachment
  with open(filename, 'rb') as f:
    part = MIMEApplication(f.read(), Name=basename(filename))
  part['Content-Disposition'] = 'attachment; filename="%s"' % basename(filename)
  msg.attach(part)

  # Send the email
  smtp = smtplib.SMTP('localhost')
  smtp.sendmail(sender, receiver, msg.as_string())
  smtp.quit()