How to send emails using Python

# Sending emails without attachments using Python.
# importing the required library. 
import smtplib 
  
# creates SMTP session 
email = smtplib.SMTP('smtp.gmail.com', 587) 
  
# TLS for security 
email.starttls() 
  
# authentication
# compiler gives an error for wrong credential. 
email.login("sender_email_id", "sender_password") 
  
# message to be sent 
message = "message_to_be_send"
  
# sending the mail 
email.sendmail("sender_email_id", "receiver_email_id", message) 
  
# terminating the session 
email.quit()

# Sending emails with attachments using Python  
# libraries to be imported 
import smtplib 
from email.mime.multipart import MIMEMultipart 
from email.mime.text import MIMEText 
from email.mime.base import MIMEBase 
from email import encoders 
fromaddr = "email_address_of_the_sender"
toaddr = "email_address_of_the_receiver"
# MIMEMultipart 
msg = MIMEMultipart() 
# senders email address 
msg['From'] = fromaddr 
# receivers email address 
msg['To'] = toaddr 
# the subject of mail
msg['Subject'] = "subject_of_the_mail"
# the body of the mail 
body = "body_of_the_mail"
# attaching the body with the msg 
msg.attach(MIMEText(body, 'plain')) 
# open the file to be sent
# rb is a flag for readonly 
filename = "file_name_with_extension"
attachment = open("Path of the file", "rb") 
# MIMEBase
attac= MIMEBase('application', 'octet-stream') 
# To change the payload into encoded form 
attc.set_payload((attachment).read()) 
# encode into base64 
encoders.encode_base64(attc) 
attc.add_header('Content-Disposition', "attachment; filename= %s" % filename) 
# attach the instance 'p' to instance 'msg' 
msg.attach(attc) 
# creates SMTP session 
email = smtplib.SMTP('smtp.gmail.com', 587) 
# TLS for security 
email.starttls() 
# authentication 
email.login(fromaddr, "Password_of_the_sender") 
# Converts the Multipart msg into a string 
message = msg.as_string() 
# sending the mail 
email.sendmail(fromaddr, toaddr, message) 
# terminating the session 
s.quit()