mesages.py

# Gopavasanth
# Date : 05/05/2018
from __future__ import print_function
import httplib2
import os

from apiclient import discovery
from oauth2client import client
from oauth2client import tools
from oauth2client.file import Storage



try:
    import argparse
    flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
except ImportError:
    flags = None

import auth


SCOPES = 'https://mail.google.com/'
CLIENT_SECRET_FILE = 'client_secret.json'
APPLICATION_NAME = 'Gmail API Python Quickstart'
authInst = auth.auth(SCOPES,CLIENT_SECRET_FILE,APPLICATION_NAME)
credentials = authInst.get_credentials()

http = credentials.authorize(httplib2.Http())
service = discovery.build('gmail', 'v1', http=http)

def list_messages_matching_query(service, user_id="me", query='[foss-2017] Status Update [27-06-2018]'):
    """List all Messages of the user's mailbox matching the query.
    Args:
      service: Authorized Gmail API service instance.
      user_id: User's email address. The special value "me"
      can be used to indicate the authenticated user.
      query: String used to filter messages returned.
      Eg.- 'from:user@some_domain.com' for Messages from a particular sender.
    Returns:
      List of Messages that match the criteria of the query. Note that the
      returned list contains Message IDs, you must use get with the
      appropriate ID to get the details of a Message.
    """
    try:
        response = service.users().messages().list(userId=user_id,
                                                   q=query).execute()
        messages = []
        if 'messages' in response:
            messages.extend(response['messages'])

        while 'nextPageToken' in response:
            page_token = response['nextPageToken']
            response = service.users().messages().list(
                userId=user_id, q=query, pageToken=page_token).execute()
            messages.extend(response['messages'])
	print (messages)
	return messages
    except errors.HttpError as error:
	print('An error occurred: %s' % error)

from datetime import date

today = str(date.today())
print("Today Date :" + today)

today = '[%s]' % date.today().strftime('%d-%m-%Y')

print (today)


list_messages_matching_query(service, user_id="me", query='[foss-2017] Status Update ' + today)
#return mssg