根日志器

# utils/logger.py
import logging
import sys
from pathlib import Path

_configured = False

def setup_logging(log_file=None, level=logging.INFO):
    """配置根日志记录器"""
    global _configured
    if _configured:
        return
    
    if log_file:
        log_path = Path(log_file)
        log_path.parent.mkdir(parents=True, exist_ok=True)
    
    # 根日志记录器
    root_logger = logging.getLogger()
    root_logger.setLevel(level)
    
    for handler in root_logger.handlers[:]:
        root_logger.removeHandler(handler)
    
    formatter = logging.Formatter(
        '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
    )
    
    # 控制台处理器
    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setFormatter(formatter)
    console_handler.setLevel(level)
    root_logger.addHandler(console_handler)
    
    # 文件处理器
    if log_file:
        file_handler = logging.FileHandler(log_file, encoding='utf-8')
        file_handler.setFormatter(formatter)
        file_handler.setLevel(level)
        root_logger.addHandler(file_handler)
    
    _configured = True

def get_logger(name=__name__):
    """获取指定名称的日志记录器"""
    return logging.getLogger(name)