Walmart Price Tracker: Real-time Price Comparison Tool

A price monitoring why need proxy IP, this matter is more important than you think.

Anyone who's ever worked in e-commerce knows that Walmart item prices can change faster than your girlfriend's face. Compare prices manually? By the time you're done checking 10 items, they've already changed their prices three times. But if you use a script to automate the process.The biggest headache is getting your IP blocked-As if a supermarket security guard finds out you take a picture of the price tag with your cell phone every day, he's sure to kick you out.

This time we have to use the proxy IP as a "cloak of invisibility". For example, with ipipgo's rotating IP pool, each visit to change a different "vest", the site simply can not be found to be the same person in the operation. Tests show that with ordinary single IP capture Walmart, an average of 15 minutes to be blocked; and with ipipgo's dynamic residential IP, running for 24 hours are fine.

import requests
from itertools import cycle

 Addresses of proxy pools provided by ipipgo
proxy_list = [
    'http://user:pass@gateway.ipipgo.com:8001',
    'http://user:pass@gateway.ipipgo.com:8002', ...
     ... More IPs
]
proxy_pool = cycle(proxy_list)

url = 'https://www.walmart.com/item/123456'
for _ in range(10):
    proxy = next(proxy_pool)
    try: resp = requests.get(url, proxies)
        resp = requests.get(url, proxies={"http": proxy}, timeout=10)
        print(f "Successfully fetching price data, using proxy:{proxy}")
        break
    except.
        print(f "Proxy {proxy} failed, automatically switching to the next one")

Second, hand to teach you to ride a reliable price comparison tool

Let's start with the core trio:Data Capture → Price Parsing → Exception Handling. The focus here is on how proxy IPs can be accessed seamlessly:

Note that the Walmart page structure is often fine-tuned, and it is recommended to use the weeklyComparison tool to verify xpathThe last time a buddy code ran well. The last time a buddy ran the code properly, Walmart changed the price class from "price" to "money" and caught a week's worth of air for nothing.

III. Common pitfalls QA

Q：Why was I blocked even though I used a proxy IP?
A: 80% of the data center IP is used, this kind of easy to be identified. Change to ipipgo's residential proxy, the camouflage degree is directly pulled full.

Q: How many IPs do I have to buy to monitor 5000 items?
A: According to the hourly calculation, ipipgo's business version of the 500 IP pool enough. Don't save this money, last time there are sellers IP is not enough, the results than the price data leakage of the explosive price drop, blood loss.

Q: How can I be notified in time when the data is captured?
A: It is recommended to pick up a pinned/enterprise WeChat robot. For example, set when a commodity is 15% lower than the opponent, immediately @ Purchasing Department stock up.

Four, ipipgo practical skills three rules

1. Cheap IPs for cold periods: When traffic is low in the early hours of the morning, use ipipgo's shared IP package to save 30% costs

2. The Great IP Warm-Up: Newly bought dedicated IP to visit a few regular pages first, don't just come up and browse the product pages!

3. hybrid authentication strategy: Let ipipgo's IP visit google.com once every 20 catches to detect if it is contaminated

A final word of caution: don't just focus on the price ofInventory status and promotional labelsEqually important. The worst case I've ever seen was the ecstasy of monitoring a price reduction, only to click in and see "store pickup only".