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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def send_mail(subject, body, email_from, emails_to):
 """ Funxtion for sending email though gmail """

    msg = MIMEText(body)
    msg['Subject'] = subject
    msg['From'] = email_from
    msg['To'] = ", ".join(emails_to)
    s = smtplib.SMTP('smtp.gmail.com', 587)
    s.ehlo()  # for tls add this line
    s.starttls()  # for tls add this line
    s.ehlo()  # for tls add this line
    s.login(SMTP_USERNAME, SMTP_PASSWORD)
    s.sendmail(email_from, emails_to, msg.as_string())
    s.quit()