from typing import List, Dict, Optional, Any
from loguru import logger

    
def safe_float(value, default=0.0):
    """安全转换为float，处理None和空值"""
    if value is None:
        return default
    try:
        return float(value)
    except (ValueError, TypeError):
        return default
    
def safe_int(value, default=0):
    """安全转换为int"""
    if value is None:
        return default
    try:
        return int(float(value))
    except (ValueError, TypeError):
        return default

def safe_str(self, value: Any, default: str = '') -> str:
    """安全转换为str"""
    if value is None:
        return ""
    try:
        return str(value)
    except Exception as e:
        logger.error(f"safe_str error: {e}")
        return ""