Basic async Google Sheet api request based on aiohttp and asyncio

aio_sheets.py

# Require PyJwt, AIOHTTP and PyCrypto (for RS256 in JWT)

import jwt
import time
import json
from pprint import pprint

import aiohttp
import asyncio

# Building JSW
def get_jwt():
    with open('credentials.json') as f:
        credentials = json.load(f)

    iat = time.time()
    # Token expiring in 1 hour
    exp = iat + 3600

    payload = {
        'iss': credentials['client_email'],
        'scope': 'https://www.googleapis.com/auth/spreadsheets',
        'aud': 'https://www.googleapis.com/oauth2/v4/token',
        'exp': exp,
        'iat': iat
    }

    return jwt.encode(payload=payload, key=credentials['private_key'], algorithm='RS256').decode('utf8')

async def aio_read(spreadsheet_id, cell_range):
    headers = {
        'Content-Type': 'application/x-www-form-urlencoded'
    }
    payload = {
        'grant_type': 'urn:ietf:params:oauth:grant-type:jwt-bearer',
        'assertion': get_jwt(),
    }

    async with aiohttp.ClientSession() as session:
        async with session.post('https://www.googleapis.com/oauth2/v4/token', headers=headers, data=payload) as res:
            access_token = (await res.json())['access_token']
            base_url = 'https://sheets.googleapis.com'
            api_call = '/v4/spreadsheets/%s/values/%s' % (spreadsheet_id, cell_range)

            headers = {
                'Authorization': 'Bearer %s' % access_token,
                'Content-Type': 'application/json'
            }
            async with session.get(base_url + api_call, headers=headers) as res:
                return await res.json()

spreadsheet_id = 'your_spreadsheet_id'

# Task queue
tasks = asyncio.gather(
    aio_read(spreadsheet_id, 'Тестовый список!A2'),
    aio_read(spreadsheet_id, 'Тестовый список!A3'),
    aio_read(spreadsheet_id, 'Тестовый список!A4'),
    aio_read(spreadsheet_id, 'Тестовый список!A5'),
)
# Create eventloop and pass the tasks to it
loop = asyncio.get_event_loop()
result = loop.run_until_complete(tasks)
loop.close()
# Print result
pprint(result)