Send Bulk Email From Python Using Cloud Console Gmail API - Python Gmail Bot

gmail_python_bot.py

import os.path
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
from google.oauth2.credentials import Credentials
from email.mime.text import MIMEText
import base64
import pandas as pd
import random
import time
import secrets

# If modifying these scopes, delete the file token.json.
SCOPES = ['https://mail.google.com/']

def create_message(sender, to, subject, message_text):
    """Create a message for an email.

    Args:
      sender: Email address of the sender.
      to: Email address of the receiver.
      subject: The subject of the email message.
      message_text: The text of the email message.

    Returns:
      An object containing a base64url encoded email object.
    """
    message = MIMEText(message_text)
    message['to'] = ", ".join(to)
    message['from'] = sender
    message['subject'] = subject
    msg_data = base64.urlsafe_b64encode(message.as_string().encode()).decode()
    return {'raw': base64.urlsafe_b64encode(message.as_string().encode()).decode()}

def send_message(service, user_id, message):
    try:
        message = (service.users().messages().send(userId=user_id, body=message)
                   .execute())
        print('Message Id: %s' % message['id'])
        return message
    except Exception as error:
        print(error)
        
if __name__ == '__main__':
    """Shows basic usage of the Gmail API.
        Lists the user's Gmail labels.
        """
    creds = None
    # The file token.json stores the user's access and refresh tokens, and is
    # created automatically when the authorization flow completes for the first
    # time.
    if os.path.exists('token.json'):
        creds = Credentials.from_authorized_user_file('token.json', SCOPES)
    # If there are no (valid) credentials available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file('credentials.json', SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open('token.json', 'w') as token:
            token.write(creds.to_json())

    service = build('gmail', 'v1', credentials=creds)

    df_message = pd.read_excel("links_description.xlsx", sheet_name=0)

    col_name = ['email']
    df_email = pd.read_csv("email_file.txt", names=col_name)

    sender = 'abc@gmail.com'
    subject = 'Python and Odoo Development Tips'
    post_after = [600, 720, 840, 900]
    # post_after = [100,60]
    for lp in range(df_message.shape[0]):
        post = random.randint(0, df_message.shape[0] - 1)
        email_message = df_message.description[post] + '\n' + df_message.link[post]

        random_emails = random.sample(df_email.email.to_list(), 20)
        # message = create_message(sender, random_emails, subject, email_message)
        message = create_message(sender, random_emails, subject, email_message)
        try:
            send_message(service=service, user_id='me', message=message)
        except Exception:
            pass
        print('*****sent to*****', random_emails)
        print('*****message*****', email_message)
        wait_sec = secrets.choice(post_after)
        time.sleep(wait_sec)        

Send Bulk Email From Python Using Cloud Console Gmail API - Python Gmail Bot