input: Write a python function to calculate the average hours of sunlight in a given city during a month.
  assert average_sunlight('Los Angeles', 'July')==345
  assert average_sunlight('New York', 'December')==150
  assert average_sunlight('Seattle', 'November')==85
output: def average_sunlight(city, month):
      sunlight_data = {
          'Los Angeles': {'January': 200, 'February': 210, 'March': 240, 'April': 270, 'May': 300, 'June': 330, 'July': 345, 'August': 340, 'September': 320, 'October': 290, 'November': 250, 'December': 220},
          'New York': {'January': 160, 'February': 170, 'March': 200, 'April': 230, 'May': 270, 'June': 290, 'July': 310, 'August': 300, 'September': 280, 'October': 230, 'November': 190, 'December': 150},
          'Seattle': {'January': 50, 'February': 70, 'March': 110, 'April': 150, 'May': 200, 'June': 240, 'July': 280, 'August': 270, 'September': 200, 'October': 130, 'November': 85, 'December': 60},
      }
      
      return sunlight_data[city][month]