-----my code------

filename = str("JDI Offline.txt").split('\')[-1:][0]
filepath = "C:WindowsJDI Offline.txt"

fo = open(filepath, "rb")
filecontent = fo.read()
fo.close()
encodedcontent = base64.b64encode(filecontent)
sender = 'vusvarshil@gmail.com'
receiver = 'vusvarshil@gmail.com'

marker = "AUNIQUEMARKER"

body = """
Test to send attatchment
"""

part1 = """From: From Varshil<vusvarshil@gmail.com>
To:me
Subject: Sending attatchment
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary=%s
--%s
""" % (marker, marker)

part2 = """Content-Type: text/plain
Content-Transfer-Encoding:8bit

%s
--%s
""" % (body, marker)

part3 = """Content-Type:multipart/mixed; name="%s"
Content-Transfer-Encoding:base64
Content-Disposition: attatchment; filepath=%s

%s
--%s--
""" % (filename, filepath, encodedcontent, marker)
message = part1 + part2 + part3

try:
    mail = smtplib.SMTP('smtp.gmail.com', 587)
    mail.ehlo()
    mail.starttls()
    mail.login('vusvarshil@gmail.com', 'xxxxxxxx')
    mail.sendmail('vusvarshil@gmail.com', 'vusvarshil@gmail.com', message)
    print "Mail Sent successfully"
except Exception:
    print "Error"

When I use this code in a class i get a blank mail

class sendmail:
  def send_mail():
import smtplib
import base64




filename = str("JDI Offline.txt").split('\')[-1:][0]
filepath = "C:WindowsJDI Offline.txt"

fo = open(filepath, "rb")
filecontent = fo.read()
fo.close()
encodedcontent = base64.b64encode(filecontent)
sender = 'vusvarshil@gmail.com'
receiver = 'vusvarshil@gmail.com'

marker = "AUNIQUEMARKER"

body = """
Test to send attatchment
"""

part1 = """From: From Varshil<vusvarshil@gmail.com>
To:me
Subject: Sending attatchment
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary=%s
--%s
""" % (marker, marker)

part2 = """Content-Type: text/plain
Content-Transfer-Encoding:8bit

%s
--%s
""" % (body, marker)

part3 = """Content-Type:multipart/mixed; name="%s"
Content-Transfer-Encoding:base64
Content-Disposition: attatchment; filepath=%s

%s
--%s--
""" % (filename, filepath, encodedcontent, marker)
message = part1 + part2 + part3

try:
    mail = smtplib.SMTP('smtp.gmail.com', 587)
    mail.ehlo()
    mail.starttls()
    mail.login('vusvarshil@gmail.com', 'xxxxxxxx')
    mail.sendmail('vusvarshil@gmail.com', 'vusvarshil@gmail.com', message)
    print "Mail Sent successfully"
except Exception:
    print "Error"
ob=sendmail()
ob.send_email()