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How to Programmatically Send Email Attachments Using Python?

How to Send Email Attachments Using Python

Sending email attachments in Python can be a straightforward task, but it may seem daunting for beginners. Here's a simplified explanation that will help you get started.

To send an email attachment, you need to attach it to the message before sending it out. This involves creating a MIME message, which allows you to add different parts to the email, including text and attachments.

There are several libraries you can use to create MIME messages in Python. One popular choice is the email package. Using this package, you can create a MIME multipart message, which consists of multiple parts, including the text of the email and any attachments.

To attach a file to the message, you can use the email.mime.application.MIMEApplication class provided by the email package. This class allows you to set the file's name and content.

To complete the process, you need to specify the sender's and recipient's email addresses, the subject and text of the email, and any files you want to attach. Then, you can use the smtplib library to send out the email.

Here's a code snippet that demonstrates how to send an email with an attachment using Python:

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()

Now you have a basic understanding of how to send email attachments in Python. You can use this knowledge to automate sending emails with attachments in your applications or scripts.

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