1

trading_system/market_scanner.py

@@ -58,8 +58,12 @@ class MarketScanner:
             logger.warning("未获取到交易对")
             return []
         
-        # 根据配置限制扫描的交易对数量
+        # 根据配置限制扫描的交易对数量（确保为整数，避免 DB/JSON 返回 float 导致 slice 报错）
         max_scan_symbols = cfg.get('MAX_SCAN_SYMBOLS', 500)
+        try:
+            max_scan_symbols = int(max_scan_symbols) if max_scan_symbols is not None else 500
+        except (TypeError, ValueError):
+            max_scan_symbols = 500
         if max_scan_symbols > 0 and max_scan_symbols < len(all_symbols):
             symbols = all_symbols[:max_scan_symbols]
             logger.info(f"限制扫描数量: {len(symbols)}/{len(all_symbols)} 个交易对（配置: MAX_SCAN_SYMBOLS={max_scan_symbols}）")
@@ -164,6 +168,11 @@ class MarketScanner:
         # 智能补单：返回 TOP_N + 额外候选数，当前 TOP_N 中部分因冷却等被跳过时，策略仍会尝试后续交易对，避免无单可下
         top_n_val = cfg.get('TOP_N_SYMBOLS', config.TRADING_CONFIG['TOP_N_SYMBOLS'])
         extra = cfg.get('SCAN_EXTRA_SYMBOLS_FOR_SUPPLEMENT', config.TRADING_CONFIG.get('SCAN_EXTRA_SYMBOLS_FOR_SUPPLEMENT', 8))
+        try:
+            top_n_val = int(top_n_val) if top_n_val is not None else 20
+            extra = int(extra) if extra is not None else 8
+        except (TypeError, ValueError):
+            top_n_val, extra = 20, 8
         take_count = min(len(sorted_results), top_n_val + extra)
         top_n = sorted_results[:take_count]