Python function to send email using a Jinja HTML template

default.j2

<style type="text/css">
@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 300;
  src: local('Open Sans Light'), local('OpenSans-Light'), url(http://fonts.gstatic.com/s/opensans/v13/DXI1ORHCpsQm3Vp6mXoaTa-j2U0lmluP9RWlSytm3ho.woff2) format('woff2');
  unicode-range: U+0460-052F, U+20B4, U+2DE0-2DFF, U+A640-A69F;
}
.body {
    width: 90%;
    margin: auto;
    font-family: 'Open Sans', 'Helvetica', sans-serif; 
    font-size: 14pt;
    color: #075D72;
}
a:link { color: #B40057; text-decoration: underline}
a:visited { color: #542A95; text-decoration: none}
a:hover { color: #B40057; background-color:#C4FFF9; text-decoration: underline }
</style>

<div class="body">
Hello Marvel heroes, lets have a beat down at Metropolis. DO NOT bring the following items!!

{{ vars['item1'] }} - this causes Superman to puke<br>
{{ vars['item2'] }} - this causes Green Lantern to be useless

<p>
</div>

<p><br><br>

send_email.py

def render_template(template, **kwargs):
    ''' renders a Jinja template into HTML '''
    # check if template exists
    if not os.path.exists(template):
        print('No template file present: %s' % template)
        sys.exit()

    import jinja2
    templateLoader = jinja2.FileSystemLoader(searchpath="/")
    templateEnv = jinja2.Environment(loader=templateLoader)
    templ = templateEnv.get_template(template)
    return templ.render(**kwargs)
#------------------------------------------------------------------------------------------------
def send_email(to, sender='MyCompanyName<[email protected]>', cc=None, bcc=None, subject=None, body=None):
    ''' sends email using a Jinja HTML template '''
    import smtplib
    # Import the email modules
    from email.mime.multipart import MIMEMultipart
    from email.mime.text import MIMEText
    from email.header import Header
    from email.utils import formataddr
    
    # convert TO into list if string
    if type(to) is not list:
        to = to.split()
    
    to_list = to + [cc] + [bcc]
    to_list = filter(None, to_list) # remove null emails

    msg = MIMEMultipart('alternative')
    msg['From']    = sender
    msg['Subject'] = subject
    msg['To']      = ','.join(to)
    msg['Cc']      = cc
    msg['Bcc']     = bcc
    msg.attach(MIMEText(body, 'html'))
    server = smtplib.SMTP("127.0.0.1") # or your smtp server
    try:
        log.info('sending email xxx')
        server.sendmail(sender, to_list, msg.as_string())
    except Exception as e:
        log.error('Error sending email')
        log.exception(str(e))
    finally:
        server.quit()
#------------------------------------------------------------------------------------------------

# MAIN   

item1 = 'kryptonite'
item2 = 'green clothing'
  
# generate HTML from template
html = render_template('default.j2', vars=locals())
  
to_list = ['[email protected]', '[email protected]']
sender = 'superman<[email protected]>'
cc = '[email protected]'
bcc = '[email protected]'
subject = 'Meet me for a beatdown'
  
# send email to a list of email addresses
send_email(to_list, sender, cc, bcc, subject, html.encode("utf8"))