Python Sendgrid send email with PDF attachment file
<p>I'm trying to attach a PDF file to my email sent with sendgrid.</p>

<p>Here is my code :</p>

<pre><code>sg = sendgrid.SendGridAPIClient(apikey=os.environ.get('SENDGRID_API_KEY'))

from_email = Email("from@example.com")
subject = "subject"
to_email = Email("to@example.com")
content = Content("text/html", email_body)

pdf = open(pdf_path, "rb").read().encode("base64")
attachment = Attachment()
attachment.set_content(pdf)
attachment.set_type("application/pdf")
attachment.set_filename("test.pdf")
attachment.set_disposition("attachment")
attachment.set_content_id(number)

mail = Mail(from_email, subject, to_email, content)
mail.add_attachment(attachment)

response = sg.client.mail.send.post(request_body=mail.get())

print(response.status_code)
print(response.body)
print(response.headers)
</code></pre>

<p>But the Sendgrid Python library is throwing an error HTTP Error 400: Bad Request. </p>

<p>What is wrong with my code ?</p>