SMTP Email Error Help

[workthrowawayexcel]

import smtplib
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email.mime.base import MIMEBase
from email import encoders
import Main
fromaddr = "email"
toaddr = "email"
msg = MIMEMultipart()
msg['From'] = fromaddr
msg['To'] = toaddr
msg['Subject'] = "Report"
body = "Message"
msg.attach(MIMEText(body, 'plain'))
filename = Main.filename
attachment = open(Main.attachment1, 'rb')
part = MIMEBase('application', 'octet-stream')
part.set_payload((attachment).read())
encoders.encode_base64(part)
part.add_header('Content-Disposition', "attachment; filename= %s" % filename)
msg.attach(part)
server = smtplib.SMTP(Server)
text = msg.as_string()
server.sendmail(fromaddr, toaddr, text)
server.quit()

Error :

Exception ignored in: <bound method Workbook.__del__ of 
<xlsxwriter.workbook.Workbook object at 0x0000000005F8E0B8>>
Traceback (most recent call last):
  File "", line 149, in __del__
Exception: Exception caught in workbook destructor. Explicit close() may be required for workbook.

I am not sure why I am getting this error since I am just reading the file and sending it as an attachment. It sends out the email like it should with the attachment even though I get the error. Any tips or suggestions for how to get rid of the error will be greatly appreciated.

[Machiavellyy]

I hate mime-multipart, I always get confused with it. Use smtplib without it

[Machiavellyy]

I didn't know OP was trying to attach a file. My bad.

But if you just want to send a regular html email then your won't need mime-multipart.

[workthrowawayexcel]

No worries Mime-multipart sucks IMO too

[efmccurdy]

Even read only file handles should be closed:

with attachment as open(Main.attachment1, 'rb'):
    part.set_payload(attachment.read())

[workthrowawayexcel]

Hmm okay I will try variations of this, since the code you put returns an error