def __init__(self, locale, site):
site_id = str(site, 'utf-8') # 地点的id
site_x = site_id[3:7]
site_y = site_id[0:3]
self.zone = timezone(site_x) # 计算时区
data_base = SQLiteDataBase(site_y) # 新建一个数据库对象
self.first_date_hour = get_first_date_hour(self.zone) # 第一个时间点
data = data_base.read(site_x, self.first_date_hour) # 从数据库中获取数据
# data的格式是[(2014120400, 2, 26695, 346, -119, 0, 624000, 103220), (...), ...]
data_base.close()
cloud_data = []
temperature_data = []
precipitation_data = []
wind_speed_data = []
wind_direction_data = []
for i in range(24):
cloud_data.append(data[i][1]) # int %
temperature_data.append(round(data[i][2] / 100 - 273.15)) # int Celsius degree
precipitation_data.append(round(data[i][5] / 1e6 * 86400)) # int mm/24h
wind_speed_data.append(math.hypot(data[i][3] / 100, data[i][4] / 100)) # float m/s
direction = math.atan2(data[i][3], data[i][4]) / math.pi * 180 + 360
wind_direction_data.append(round(direction % 360)) # int degree
self.temperature = Temperature(temperature_data)
self.cloud = Cloud(cloud_data)
self.precipitation = Precipitation(precipitation_data)
self.wind = Wind(wind_speed_data, wind_direction_data)
class Forecast():
def __init__(self, locale, site):
site_id = str(site, 'utf-8') # 地点的id
site_x = site_id[3:7]
site_y = site_id[0:3]
self.zone = timezone(site_x) # 计算时区
data_base = SQLiteDataBase(site_y) # 新建一个数据库对象
self.first_date_hour = get_first_date_hour(self.zone) # 第一个时间点
data = data_base.read(site_x, self.first_date_hour) # 从数据库中获取数据
# data的格式是[(2014120400, 2, 26695, 346, -119, 0, 624000, 103220), (...), ...]
data_base.close()
cloud_data = []
temperature_data = []
precipitation_data = []
wind_speed_data = []
wind_direction_data = []
for i in range(24):
cloud_data.append(data[i][1]) # int %
temperature_data.append(round(data[i][2] / 100 - 273.15)) # int Celsius degree
precipitation_data.append(round(data[i][5] / 1e6 * 86400)) # int mm/24h
wind_speed_data.append(math.hypot(data[i][3] / 100, data[i][4] / 100)) # float m/s
direction = math.atan2(data[i][3], data[i][4]) / math.pi * 180 + 360
wind_direction_data.append(round(direction % 360)) # int degree
self.temperature = Temperature(temperature_data)
self.cloud = Cloud(cloud_data)
self.precipitation = Precipitation(precipitation_data)
self.wind = Wind(wind_speed_data, wind_direction_data)
def get_forecast(self):
"""
:return: 第一个返回值是字符串长度列表，列表的第一个元素是总长度
"""
forecast = bytes()
l = []
string_list = self.get_date_list() + self.cloud.forecast() + \
self.temperature.forecast() + self.precipitation.forecast() + \
self.wind.forecast()
for string in string_list:
f = string.encode('utf-8')
forecast = forecast + f
l.append(len(f))
length_list = [len(forecast)]
length_list.extend(l)
return bytes(length_list), forecast
def get_date_list(self):
date_format = '%Y-%m-%d %H'
today = datetime.strptime(self.first_date_hour, '%Y%m%d%H') + timedelta(hours=self.zone)
tomorrow = today + timedelta(days=1)
day_after_tomorrow = today + timedelta(days=2)
today = today.strftime(date_format)
tomorrow = tomorrow.strftime(date_format)
day_after_tomorrow = day_after_tomorrow.strftime(date_format)
return [today, tomorrow, day_after_tomorrow]