python gmail api code for non-interruption format

final_token.py

import os.path

from google.auth.transport.requests import Request
from google.oauth2.credentials import Credentials
from google_auth_oauthlib.flow import InstalledAppFlow
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError
import base64
from email.message import EmailMessage
import google.auth

SCOPES = [
  "https://www.googleapis.com/auth/gmail.send"
  ]

def main():
  creds = None
  if os.path.exists("token.json"):
    creds = Credentials.from_authorized_user_file("token.json", SCOPES)
  if not creds or not creds.valid:
    if creds and creds.expired and creds.refresh_token:
      creds.refresh(Request())
    else:
      return {
        "msg": "Wrong credentials"
      }, 403

  try:
    service = build("gmail", "v1", credentials=creds)
    message = EmailMessage()
    message.set_content("<h1>Hi rishi</h1>")
    message["To"] = "xxxxxxxxxxx@gmail.com"
    message["From"] = "xxxxxxxxxxx@gmail.com"
    message["Subject"] = "Automated draft"
    encoded_message = base64.urlsafe_b64encode(message.as_bytes()).decode()

    create_message = {"raw": encoded_message}
    send_message = (
        service.users()
        .messages()
        .send(userId="me", body=create_message)
        .execute()
    )
    print(f'Message Id: {send_message["id"]}')
  except HttpError as error:
    print(f"An error occurred: {error}")
    send_message = None
  return send_message

if __name__ == "__main__":
  main()

popup_token.py

import os.path
import base64
from google.auth.transport.requests import Request
from google.oauth2.credentials import Credentials
from google_auth_oauthlib.flow import InstalledAppFlow
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError
from email.message import EmailMessage

SCOPES = [
  "https://www.googleapis.com/auth/gmail.send"
]

def main():
  creds = None
  if os.path.exists("token.json"):
    creds = Credentials.from_authorized_user_file("token.json", SCOPES)
  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)
    with open("token.json", "w") as token:
      token.write(creds.to_json())
  try:
    service = build("gmail", "v1", credentials=creds)
    message = EmailMessage()
    message.set_content("This is automated draft mail")
    message["To"] = "xxxxxxxxx@gmail.com"
    message["From"] = "xxxxxxxxx@gmail.com"
    message["Subject"] = "Automated draft"
    encoded_message = base64.urlsafe_b64encode(message.as_bytes()).decode()
    create_message = {"raw": encoded_message}
    send_message = (
        service.users()
        .messages()
        .send(userId="me", body=create_message)
        .execute()
    )
    print(f'Message Id: {send_message["id"]}')
  except HttpError as error:
    print(f"An error occurred: {error}")
    send_message = None
  return send_message

if __name__ == "__main__":
  main()

token_structure.json

{
  "token": "ya29.xxx-xxxxxxx-xxxxx-xxxxxx-xxxxx-xxxxxxxxx",
  "refresh_token": "1//xxxxx-xxxxx-xxxxxxxxxxx_-dA",
  "token_uri": "https://oauth2.googleapis.com/token",
  "client_id": "xxxxxx-xxxxxxxxxxxxxxxxxxxxx.apps.googleusercontent.com",
  "client_secret": "xxxxxx-xxxxxxxxxxxxxxxxxxxxx",
  "scopes": [
    "https://www.googleapis.com/auth/gmail.send"
  ],
  "universe_domain": "googleapis.com",
  "account": "",
  "expiry": "2024-04-22T11:47:55.499989Z"
}