Python の requests で、SendGrid V3 を使う

API V3 概要

プログラムを実行した様子

$ ./test_mail.py 
*** 開始 ***
<Response [202]>
*** 終了 ***

test_mail.py

#! /usr/bin/python
# -*- coding: utf-8 -*-
#
#   test_mail.py
#
# --------------------------------------------------------------------
import sys

from sendgrid_v3 import sendgrid_v3_proc
# --------------------------------------------------------------------
sys.stderr.write("*** 開始 ***\n")

content='ハロー ワールド\n'
content += 'テスト\n'
content += '本日は晴天なり。\n'
content += '今日は暑い。\n'
content += "Hello World\n"
content += "Good Afternoon\n"
content += "以上。\n"

mail_from = '[e-mail]'
mail_to = '[e-mail]'

subject = 'From SendGrid Aug/24/2017 PM 16:56'
#
sendgrid_v3_proc(mail_from,mail_to,subject,content)
#
sys.stderr.write("*** 終了 ***\n")
# --------------------------------------------------------------------

次のプログラムの api_key は変更して下さい。

sendgrid_v3.py

# -*- coding: utf-8 -*-
#
#   sendgrid.py
#
# --------------------------------------------------------------------
import requests
import sys
import json

# --------------------------------------------------------------------
def sendgrid_v3_proc(mail_from,mail_to,subject,content):
#
    args = {
        "personalizations": [{"to": [{"email": mail_to}]}],
        "from": {"email": mail_from},
        "subject": subject,
        "content": [{"type": "text/plain", "value": content}]
        }

    json_str = json.dumps(args)

    api_key = 'SG.2ZQgUBNcQeiBbLspta6sQw.-UebHZZApnZNesJfzAMf1F9F8WjUESpB1rzBp-FFCN-Y'
    headers = {
        'Content-Type': 'application/json',
        'Authorization': 'Bearer ' + api_key
        }

    url='https://api.sendgrid.com/v3/mail/send'

    try:
        rr = requests.post(url,json_str,headers=headers)
        print(rr)
    except Exception as ee:
        sys.stderr.write('*** error *** requests.post ***\n')
        sys.stderr.write(str(ee) + '\n')
#
# --------------------------------------------------------------------