import asyncio
import aiohttp

url_req ='https://www.prevision-meteo.ch/services/json/'

async def get_temp(city:str):
  """Get the temperature of the city given in params"""
    print(f"Request for {city}.")
    s = time.perf_counter()
    async with aiohttp.ClientSession() as session:
        async with session.get(url=url_req+city.lower()) as r:
            temp = await r.json()
             elapsed = time.perf_counter() - s
             print(f"Response is now ready {elapsed:0.2f} seconds.\nTemperature at {city} : {temp.get('current_condition')['tmp']} C.")
                   
async def main():
    await asyncio.gather(get_temp('Paris'),get_temp('Toulouse'),get_temp('Marseille'))
                   
if __name__ == "__main__":
    import time
    s = time.perf_counter()
    asyncio.run(main())
    elapsed = time.perf_counter() - s
    print(f"Program executed in {elapsed:0.2f} seconds.")