现在可以正常工作了

datasvc/app/storage.py

@@ -85,6 +85,31 @@ def upsert_candles(base_dir: str, symbol: str, timeframe: str, candles: List[Lis
                     pass
 
 
+def write_candles_snapshot(base_dir: str, symbol: str, timeframe: str, df: pd.DataFrame):
+    columns = ["timestamp", "open", "high", "low", "close", "volume"]
+    if df.empty:
+        safe_df = pd.DataFrame(columns=columns)
+    else:
+        safe_df = df[columns].copy()
+        safe_df = safe_df.drop_duplicates(subset=["timestamp"], keep="last").sort_values("timestamp").reset_index(drop=True)
+    p = _path(base_dir, symbol, timeframe)
+    with _lock:
+        temp_path = f"{p}.tmp"
+        try:
+            safe_df.to_parquet(temp_path, index=False)
+            os.replace(temp_path, p)
+        finally:
+            if os.path.exists(temp_path):
+                try:
+                    os.remove(temp_path)
+                except OSError:
+                    pass
+
+
+def candle_path(base_dir: str, symbol: str, timeframe: str) -> str:
+    return _path(base_dir, symbol, timeframe)
+
+
 def get_last_timestamp(base_dir: str, symbol: str, timeframe: str) -> Optional[int]:
     p = _path(base_dir, symbol, timeframe)
     if not os.path.exists(p):