Python结合淘宝关键词API进行商品价格监控与预警

摘要：本文探讨如何利用Python定时调用淘宝关键词API获取商品价格信息，并通过设置价格阈值实现价格波动预警。通过代码实现价格数据的定时采集、存储和分析，当商品价格超过预设阈值时，自动发送预警信息（如邮件或短信），帮助商家或消费者及时掌握价格动态。

代码示例：

python

复制代码

`import requests
import hashlib
import time
import json
import smtplib
from email.mime.text import MIMEText

def generate_sign(params, app_secret):
    # 同主题一中的签名生成函数
    pass

def get_item_price(app_key, app_secret, item_id):
    # 假设存在获取单个商品详情的API调用，这里简化示例
    # 实际需根据淘宝API文档调整
    url = "https://eco.taobao.com/router/rest"
    timestamp = time.strftime("%Y-%m-%d %H:%M:%S")
    params = {
        "method": "taobao.item.get",  # 假设接口
        "app_key": app_key,
        "timestamp": timestamp,
        "v": "2.0",
        "format": "json",
        "num_iid": item_id
    }
    params["sign"] = generate_sign(params, app_secret)
    response = requests.get(url, params=params)
    data = response.json()
    return float(data["item_get_response"]["item"]["price"])

def send_alert_email(subject, content):
    sender = "your_email@example.com"
    receivers = ["recipient@example.com"]
    message = MIMEText(content, "plain", "utf-8")
    message["Subject"] = subject
    message["From"] = sender
    message["To"] = ",".join(receivers)

    try:
        smtpObj = smtplib.SMTP("smtp.example.com", 25)
        smtpObj.login("your_email@example.com", "your_password")
        smtpObj.sendmail(sender, receivers, message.as_string())
        print("邮件发送成功")
    except smtplib.SMTPException as e:
        print(f"邮件发送失败: {e}")

# 示例调用
app_key = "YOUR_APP_KEY"
app_secret = "YOUR_APP_SECRET"
item_id = "123456789"
current_price = get_item_price(app_key, app_secret, item_id)
threshold_price = 100.0  # 预设阈值

if current_price > threshold_price:
    subject = "价格预警：商品价格超过阈值"
    content = f"商品ID：{item_id}，当前价格：{current_price}，超过阈值：{threshold_price}"
    send_alert_email(subject, content)`