class SmtpMailer(object):

    """SMTP mailer class

    mailer = SmtpMailer(mail_from, user, passwd, mail_server, mail_port, ssl, tls)

    mailer.send(recipients, subject, body, attachment_files)    

    :param recipients might be a list of string or single string

    :param attachment_files is a dict of {filename:location} 

        it tries to guess the mimetype and attach the file 

    """

    def __init__(self, mail_from, user, passwd, mail_server,

                    mail_port=None, ssl=False, tls=False):

        self.mail_from = mail_from

        self.mail_server = mail_server

        self.mail_port = mail_port

        self.user = user

        self.passwd = passwd

        self.ssl = ssl

        self.tls = tls

        self.debug = False

        if isinstance(recipients, basestring):

            recipients = [recipients]

        if self.ssl:

            smtp_serv = smtplib.SMTP_SSL(self.mail_server, self.mail_port)

        else:

            smtp_serv = smtplib.SMTP(self.mail_server, self.mail_port)

        if self.tls:

            smtp_serv.ehlo()

            smtp_serv.starttls()

        if self.debug:

            smtp_serv.set_debuglevel(1)

        smtp_serv.ehlo()

        #if server requires authorization you must provide login and password

        #but only if we have them

        if self.user and self.passwd:

            smtp_serv.login(self.user, self.passwd)

        date_ = formatdate(localtime=True)

                    # Note: we should handle calculating the charset

                    file_part = MIMEText(self.get_content(msg_file),

                                         _subtype=subtype)

                elif maintype == 'image':

                    file_part = MIMEImage(self.get_content(msg_file),

                                          _subtype=subtype)

                elif maintype == 'audio':

                    file_part = MIMEAudio(self.get_content(msg_file),

                                          _subtype=subtype)

                else:

                    file_part = MIMEBase(maintype, subtype)

                    file_part.set_payload(self.get_content(msg_file))

                    # Encode the payload using Base64

                    encoders.encode_base64(msg)

                # Set the filename parameter

                file_part.add_header('Content-Disposition', 'attachment',

                                     filename=f_name)

                file_part.add_header('Content-Type', ctype, name=f_name)

                msg.attach(file_part)

        else:

            raise Exception('Attachment files should be'

                            'a dict in format {"filename":"filepath"}')

    def get_content(self, msg_file):

        else just read because it's a probably open file object

        :param msg_file:

        if isinstance(msg_file, str):

            return open(msg_file, "rb").read()

        else:

            #just for safe seek to 0

            msg_file.seek(0)

            return msg_file.read()