another.py

import os
import base64
from google.oauth2.credentials import Credentials
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
from googleapiclient.discovery import build

# If modifying these SCOPES, delete the file token.json.
SCOPES = ['https://www.googleapis.com/auth/gmail.readonly']

def authenticate_gmail():
    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')
    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(
                'path/to/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())
    return creds

def get_emails():
    creds = authenticate_gmail()
    service = build('gmail', 'v1', credentials=creds)

    # Call the Gmail API to get a list of message IDs
    results = service.users().messages().list(userId='me', labelIds=['INBOX']).execute()
    messages = results.get('messages', [])

    # Print the subject of each email
    for message in messages:
        msg = service.users().messages().get(userId='me', id=message['id']).execute()
        subject = next((header['value'] for header in msg['payload']['headers'] if header['name'] == 'Subject'), 'N/A')
        print(f"Subject: {subject}")

if __name__ == '__main__':
    get_emails()