How to send email attachments?

Question

I am having problems understanding how to email an attachment using Python. I have successfully emailed simple messages with the smtplib. Could someone please explain how to send an attachment in an email. I know there are other posts online but as a Python beginner I find them hard to understand.

Answer 1

Here's another:

import smtplib from os.path import basename from email.mime.application import MIMEApplication from email.mime.multipart import MIMEMultipart from email.mime.text import MIMEText from email.utils import COMMASPACE, formatdate   def send_mail(send_from, send_to, subject, text, files=None,               server="127.0.0.1"):     assert isinstance(send_to, list)      msg = MIMEMultipart()     msg['From'] = send_from     msg['To'] = COMMASPACE.join(send_to)     msg['Date'] = formatdate(localtime=True)     msg['Subject'] = subject      msg.attach(MIMEText(text))      for f in files or []:         with open(f, "rb") as fil:             part = MIMEApplication(                 fil.read(),                 Name=basename(f)             )         # After the file is closed         part['Content-Disposition'] = 'attachment; filename="%s"' % basename(f)         msg.attach(part)       smtp = smtplib.SMTP(server)     smtp.sendmail(send_from, send_to, msg.as_string())     smtp.close() 

It's much the same as the first example... But it should be easier to drop in.

Answer 2

Here is the modified version from Oli for python 3

import smtplib from pathlib import Path from email.mime.multipart import MIMEMultipart from email.mime.base import MIMEBase from email.mime.text import MIMEText from email.utils import COMMASPACE, formatdate from email import encoders   def send_mail(send_from, send_to, subject, message, files=[],               server="localhost", port=587, username='', password='',               use_tls=True):     """Compose and send email with provided info and attachments.      Args:         send_from (str): from name         send_to (list[str]): to name(s)         subject (str): message title         message (str): message body         files (list[str]): list of file paths to be attached to email         server (str): mail server host name         port (int): port number         username (str): server auth username         password (str): server auth password         use_tls (bool): use TLS mode     """     msg = MIMEMultipart()     msg['From'] = send_from     msg['To'] = COMMASPACE.join(send_to)     msg['Date'] = formatdate(localtime=True)     msg['Subject'] = subject      msg.attach(MIMEText(message))      for path in files:         part = MIMEBase('application', "octet-stream")         with open(path, 'rb') as file:             part.set_payload(file.read())         encoders.encode_base64(part)         part.add_header('Content-Disposition',                         'attachment; filename={}'.format(Path(path).name))         msg.attach(part)      smtp = smtplib.SMTP(server, port)     if use_tls:         smtp.starttls()     smtp.login(username, password)     smtp.sendmail(send_from, send_to, msg.as_string())     smtp.quit()