Files
static/lib/weather_forecast.py
2025-07-08 14:37:40 +09:00

301 lines
9.3 KiB
Python

import requests
from datetime import datetime, timedelta
def parse_precip(value):
if value == '강수없음':
return 0.0
elif '1mm 미만' in str(value):
return 0.5
else:
try:
return float(value)
except:
return 0.0
def get_latest_base_date_time(now=None):
if now is None:
now = datetime.now()
base_times = ["2330", "0230", "0530", "0830", "1130", "1430", "1730", "2030"]
candidate = None
for bt in reversed(base_times):
hour = int(bt[:2])
minute = int(bt[2:])
if (now.hour > hour) or (now.hour == hour and now.minute >= minute):
candidate = bt
break
if candidate is None:
candidate = "2330"
now -= timedelta(days=1)
base_date = now.strftime("%Y%m%d")
return base_date, candidate
def get_daily_ultra_forecast(serviceKey):
base_date, base_time = get_latest_base_date_time()
url = "http://apis.data.go.kr/1360000/VilageFcstInfoService_2.0/getUltraSrtFcst"
params = {
'serviceKey': serviceKey,
'numOfRows': '1000',
'pageNo': '1',
'dataType': 'JSON',
'base_date': base_date,
'base_time': base_time,
'nx': '57',
'ny': '130'
}
try:
resp = requests.get(url, params=params, timeout=10)
resp.raise_for_status()
items = resp.json()['response']['body']['items']['item']
except Exception as e:
print(f"[ERROR] 초단기예보 호출 실패: {e}")
return {}
daily_data = {}
for item in items:
dt = item['fcstDate']
cat = item['category']
val = item['fcstValue']
if dt not in daily_data:
daily_data[dt] = {'sumRn': 0, 'minTa': [], 'maxTa': [], 'rhm': []}
if cat == 'RN1':
daily_data[dt]['sumRn'] += parse_precip(val)
elif cat == 'T3H':
try:
t = float(val)
daily_data[dt]['minTa'].append(t)
daily_data[dt]['maxTa'].append(t)
except:
pass
elif cat == 'REH':
try:
daily_data[dt]['rhm'].append(float(val))
except:
pass
result = {}
for dt, vals in daily_data.items():
minTa = min(vals['minTa']) if vals['minTa'] else 0
maxTa = max(vals['maxTa']) if vals['maxTa'] else 0
avgRhm = sum(vals['rhm']) / len(vals['rhm']) if vals['rhm'] else 0
sumRn = round(vals['sumRn'], 2)
result[dt] = {'sumRn': sumRn, 'minTa': minTa, 'maxTa': maxTa, 'avgRhm': avgRhm}
return result
def get_daily_vilage_forecast(serviceKey):
base_date, _ = get_latest_base_date_time()
url = "http://apis.data.go.kr/1360000/VilageFcstInfoService_2.0/getVilageFcst"
params = {
'serviceKey': serviceKey,
'numOfRows': '1000',
'pageNo': '1',
'dataType': 'JSON',
'base_date': base_date,
'base_time': '0200',
'nx': '57',
'ny': '130'
}
try:
resp = requests.get(url, params=params, timeout=10)
resp.raise_for_status()
items = resp.json()['response']['body']['items']['item']
except Exception as e:
print(f"[ERROR] 단기예보 호출 실패: {e}")
return {}
daily_data = {}
for item in items:
dt = item['fcstDate']
cat = item['category']
val = item['fcstValue']
if dt not in daily_data:
daily_data[dt] = {'sumRn': 0, 'minTa': [], 'maxTa': [], 'rhm': []}
if cat == 'RN1':
daily_data[dt]['sumRn'] += parse_precip(val)
elif cat == 'TMN':
try:
daily_data[dt]['minTa'].append(float(val))
except:
pass
elif cat == 'TMX':
try:
daily_data[dt]['maxTa'].append(float(val))
except:
pass
elif cat == 'REH':
try:
daily_data[dt]['rhm'].append(float(val))
except:
pass
result = {}
for dt, vals in daily_data.items():
minTa = min(vals['minTa']) if vals['minTa'] else 0
maxTa = max(vals['maxTa']) if vals['maxTa'] else 0
avgRhm = sum(vals['rhm']) / len(vals['rhm']) if vals['rhm'] else 0
sumRn = round(vals['sumRn'], 2)
result[dt] = {
'sumRn': sumRn,
'minTa': minTa,
'maxTa': maxTa,
'avgRhm': avgRhm
}
return result
def get_midterm_forecast(serviceKey, regId='11B20305'):
# 중기 강수확률 예보
url = "http://apis.data.go.kr/1360000/MidFcstInfoService/getMidLandFcst"
# 발표 시각 계산: 06시 또는 18시만 존재
now = datetime.now()
if now.hour < 6:
tmFc = (now - timedelta(days=1)).strftime("%Y%m%d") + "1800"
elif now.hour < 18:
tmFc = now.strftime("%Y%m%d") + "0600"
else:
tmFc = now.strftime("%Y%m%d") + "1800"
params = {
'serviceKey': serviceKey,
'regId': regId,
'tmFc': tmFc,
'numOfRows': 10,
'pageNo': 1,
'dataType': 'JSON',
}
try:
resp = requests.get(url, params=params, timeout=10)
resp.raise_for_status()
data = resp.json()
items = data.get('response', {}).get('body', {}).get('items', {}).get('item', [])
if not items:
print(f"[ERROR] 중기예보 응답 item 없음. tmFc={tmFc}, regId={regId}")
return {}, {}
item = items[0] # 실제 예보 데이터
except Exception as e:
print(f"[ERROR] 중기예보 호출 실패: {e}")
return {}, {}
# 3~10일 후 강수확률 추출
precip_probs = {}
for day in range(3, 11):
key = f'rnSt{day}'
try:
precip_probs[day] = int(item.get(key, 0))
except:
precip_probs[day] = 0
return precip_probs, item
def get_midterm_temperature_forecast(serviceKey, regId='11B20305'): # 파주 코드
url = "http://apis.data.go.kr/1360000/MidFcstInfoService/getMidTa"
# 발표시각은 06:00 또는 18:00
now = datetime.now()
if now.hour < 6:
tmFc = (now - timedelta(days=1)).strftime("%Y%m%d") + "1800"
elif now.hour < 18:
tmFc = now.strftime("%Y%m%d") + "0600"
else:
tmFc = now.strftime("%Y%m%d") + "1800"
params = {
'serviceKey': serviceKey,
'regId': regId,
'tmFc': tmFc,
'pageNo': '1',
'numOfRows': '10',
'dataType': 'JSON'
}
try:
resp = requests.get(url, params=params, timeout=10)
resp.raise_for_status()
data = resp.json()
# 응답 검증
items = data.get("response", {}).get("body", {}).get("items", {}).get("item", [])
if not items:
print(f"[ERROR] 응답에 item 없음. tmFc={tmFc}, regId={regId}")
return {}
item = items[0]
except Exception as e:
print(f"[ERROR] 중기기온예보 호출 실패: {e}")
return {}
temps = {}
for day in range(3, 11):
min_key = f'taMin{day}'
max_key = f'taMax{day}'
try:
temps[day] = {
'min': int(item.get(min_key, 0)),
'max': int(item.get(max_key, 0))
}
except:
temps[day] = {'min': 0, 'max': 0}
return temps
def get_weekly_precip(serviceKey):
from datetime import date
today = date.today()
sunday = today + timedelta(days=(6 - today.weekday()))
ultra = get_daily_ultra_forecast(serviceKey)
short = get_daily_vilage_forecast(serviceKey)
mid_precip, _ = get_midterm_forecast(serviceKey)
mid_temp = get_midterm_temperature_forecast(serviceKey)
results = {}
for i in range((sunday - today).days + 1):
dt = today + timedelta(days=i)
dt_str = dt.strftime("%Y%m%d")
results[dt_str] = {
'sumRn': 0,
'minTa': 0,
'maxTa': 0,
'avgRhm': 0
}
# 강수량과 습도는 초단기예보 우선 반영
if dt_str in ultra:
results[dt_str]['sumRn'] = ultra[dt_str]['sumRn']
results[dt_str]['avgRhm'] = ultra[dt_str]['avgRhm']
# 최고/최저기온은 단기예보로만 덮어쓰기 (0이 아니면 덮어쓰기)
if dt_str in short:
if short[dt_str]['minTa'] != 0:
results[dt_str]['minTa'] = short[dt_str]['minTa']
if short[dt_str]['maxTa'] != 0:
results[dt_str]['maxTa'] = short[dt_str]['maxTa']
# 중기예보 보정 (3일 이후부터)
day_idx = (dt - today).days + 1
if day_idx >= 3:
if day_idx in mid_precip:
mid_rain = mid_precip[day_idx] / 100 * 5.0
if results[dt_str]['sumRn'] < mid_rain:
results[dt_str]['sumRn'] = mid_rain
if day_idx in mid_temp:
# 단기예보로 이미 값이 있으면 건너뛰기
if results[dt_str]['minTa'] == 0:
results[dt_str]['minTa'] = mid_temp[day_idx]['min']
if results[dt_str]['maxTa'] == 0:
results[dt_str]['maxTa'] = mid_temp[day_idx]['max']
return results
if __name__ == '__main__':
serviceKey = "mHrZoSnzVc+2S4dpCe3A1CgI9cAu1BRttqRdoEy9RGbnKAKyQT4sqcESDqqY3grgBGQMuLeEgWIS3Qxi8rcDVA=="
print(get_weekly_precip(serviceKey))