开发者必看：淘宝 Item_get API 接入详解与常见错误排查

import requests
import hashlib
import time
import json

class TaobaoAPI:
    def __init__(self, app_key, app_secret):
        self.app_key = app_key
        self.app_secret = app_secret
        self.api_url = "https://eco.taobao.com/router/rest"
    
    def sign(self, params):
        """生成签名"""
        # 排序参数
        sorted_params = sorted(params.items(), key=lambda x: x[0])
        # 拼接字符串
        sign_str = self.app_secret
        for k, v in sorted_params:
            sign_str += f"{k}{v}"
        sign_str += self.app_secret
        # 计算MD5
        return hashlib.md5(sign_str.encode()).hexdigest().upper()
    
    def item_get(self, num_iid, fields=None):
        """调用item_get API"""
        # 基础参数
        params = {
            "method": "taobao.item.get",
            "app_key": self.app_key,
            "timestamp": time.strftime("%Y-%m-%d %H:%M:%S"),
            "format": "json",
            "v": "2.0",
            "num_iid": num_iid,
            "sign_method": "md5"
        }
        
        # 添加可选字段参数
        if fields:
            params["fields"] = fields
        
        # 生成签名
        params["sign"] = self.sign(params)
        
        try:
            # 发送请求
            response = requests.get(self.api_url, params=params, timeout=10)
            response.raise_for_status()  # 抛出HTTP错误
            
            # 解析响应
            result = response.json()
            
            # 检查是否有错误
            if "error_response" in result:
                error = result["error_response"]
                return {
                    "success": False,
                    "error_code": error["code"],
                    "error_msg": error["msg"]
                }
            
            return {
                "success": True,
                "data": result["item_get_response"]["item"]
            }
            
        except requests.exceptions.RequestException as e:
            return {
                "success": False,
                "error_msg": f"请求异常: {str(e)}"
            }

# 使用示例
if __name__ == "__main__":
    # 替换为你的App Key和App Secret
    APP_KEY = "your_app_key"
    APP_SECRET = "your_app_secret"
    
    # 初始化API客户端
    taobao_api = TaobaoAPI(APP_KEY, APP_SECRET)
    
    # 调用item_get API，获取商品ID为123456789的商品信息
    # 只获取标题、价格、销量字段
    result = taobao_api.item_get(
        num_iid="123456789",
        fields="title,price,sales"
    )
    
    # 处理结果
    if result["success"]:
        print("获取商品信息成功:")
        print(json.dumps(result["data"], ensure_ascii=False, indent=2))
    else:
        print(f"获取商品信息失败: {result.get('error_msg', '未知错误')}")
        if "error_code" in result:
            print(f"错误代码: {result['error_code']}")