input: Write a function to return the number of days in a given month.
  assert get_days_in_month('February') == 28
  assert get_days_in_month('April') == 30
  assert get_days_in_month('December') == 31
output: def get_days_in_month(month):
      days_in_month = {
          'January': 31, 'February': 28, 'March': 31, 'April': 30, 'May': 31, 'June': 30,
          'July': 31, 'August': 31, 'September': 30, 'October': 31, 'November': 30, 'December': 31
      }
      return days_in_month.get(month, 0)