chore: enforce linting as part of build

app/services/price_feed.py

@@ -3,7 +3,7 @@
 import asyncio
 import logging
 from dataclasses import dataclass
-from datetime import datetime, timedelta
+from datetime import datetime
 from typing import Optional
 
 import yfinance as yf
@@ -16,6 +16,7 @@ logger = logging.getLogger(__name__)
 @dataclass
 class PriceData:
     """Price data for a symbol."""
+
     symbol: str
     price: float
     currency: str
@@ -25,19 +26,19 @@ class PriceData:
 
 class PriceFeed:
     """Live price feed service using yfinance with Redis caching."""
-    
+
     CACHE_TTL_SECONDS = 60
     DEFAULT_SYMBOLS = ["GLD", "TLT", "BTC-USD"]
-    
+
     def __init__(self):
         self._cache = get_cache()
-    
+
     async def get_price(self, symbol: str) -> Optional[PriceData]:
         """Get current price for a symbol, with caching.
-        
+
         Args:
             symbol: Yahoo Finance symbol (e.g., "GLD", "BTC-USD")
-            
+
         Returns:
             PriceData or None if fetch fails
         """
@@ -47,7 +48,7 @@ class PriceFeed:
             cached = await self._cache.get(cache_key)
             if cached:
                 return PriceData(**cached)
-        
+
         # Fetch from yfinance
         try:
             data = await self._fetch_yfinance(symbol)
@@ -55,44 +56,39 @@ class PriceFeed:
                 # Cache the result
                 if self._cache.enabled:
                     await self._cache.set(
-                        cache_key, 
+                        cache_key,
                         {
                             "symbol": data.symbol,
                             "price": data.price,
                             "currency": data.currency,
                             "timestamp": data.timestamp.isoformat(),
-                            "source": data.source
+                            "source": data.source,
                         },
-                        ttl=self.CACHE_TTL_SECONDS
+                        ttl=self.CACHE_TTL_SECONDS,
                     )
                 return data
         except Exception as e:
             logger.error(f"Failed to fetch price for {symbol}: {e}")
-        
+
         return None
-    
+
     async def _fetch_yfinance(self, symbol: str) -> Optional[PriceData]:
         """Fetch price from yfinance (run in thread pool to avoid blocking)."""
         loop = asyncio.get_event_loop()
         return await loop.run_in_executor(None, self._sync_fetch_yfinance, symbol)
-    
+
     def _sync_fetch_yfinance(self, symbol: str) -> Optional[PriceData]:
         """Synchronous yfinance fetch."""
         ticker = yf.Ticker(symbol)
         hist = ticker.history(period="1d", interval="1m")
-        
+
         if not hist.empty:
             last_price = hist["Close"].iloc[-1]
             currency = ticker.info.get("currency", "USD")
-            
-            return PriceData(
-                symbol=symbol,
-                price=float(last_price),
-                currency=currency,
-                timestamp=datetime.utcnow()
-            )
+
+            return PriceData(symbol=symbol, price=float(last_price), currency=currency, timestamp=datetime.utcnow())
         return None
-    
+
     async def get_prices(self, symbols: list[str]) -> dict[str, Optional[PriceData]]:
         """Get prices for multiple symbols concurrently."""
         tasks = [self.get_price(s) for s in symbols]