add files

logger.py

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+import logging
+import os
+
+# 全局变量，用于存储logger实例
+_logger_instance = None
+
+def setup_logger():
+    global _logger_instance
+    if _logger_instance:
+        return _logger_instance
+
+    log_dir = "logs"
+    os.makedirs(log_dir, exist_ok=True)
+    log_file = os.path.join(log_dir, "strategy.log")
+
+    logger = logging.getLogger("StrategyLogger")
+    logger.setLevel(logging.DEBUG)
+
+    # 防止重复添加handler
+    if not logger.handlers:
+        # 输出到控制台
+        console_handler = logging.StreamHandler()
+        console_handler.setLevel(logging.INFO)
+
+        # 输出到文件
+        file_handler = logging.FileHandler(log_file, encoding="utf-8")
+        file_handler.setLevel(logging.DEBUG)
+
+        formatter = logging.Formatter('%(asctime)s - [%(levelname)s] - %(message)s')
+        console_handler.setFormatter(formatter)
+        file_handler.setFormatter(formatter)
+
+        logger.addHandler(console_handler)
+        logger.addHandler(file_handler)
+
+    _logger_instance = logger
+    return logger
+
+# 直接导出一个已经初始化好的logger实例
+logger = setup_logger()