Using BeautifulSoup: Python Web Parsing Tutorials

First, why use proxy IP with web crawling?

Brothers do data collection must have encountered the site blocked IP bad thing, right? At this time we have to ask the proxy IP this magic weapon. As if you want to go to the supermarket to buy special goods, but the supermarket regulations per person per day can only enter three times, this time to find a few friends to take turns to help you go in purchasing is not more efficient? ipipgo home dynamic residential agent is such a "purchasing squad", each request for an automatic change in the IP address, the perfect way to avoid the site's wind control radar.

Second, BeautifulSoup basic operation of the crash course

先整明白怎么用这把”瑞士军刀”。安装记得用镜像源代理ip：

pip install beautifulsoup4 -i https://pypi.tuna.tsinghua.edu.cn/simple

For example, suppose we want to pickpocket the prices of an e-commerce site (note the use of proxies):

from bs4 import BeautifulSoup
import requests

 Replace this with the proxies provided by ipipgo.
proxies = {
  'http': 'http://username:password@gateway.ipipgo.com:9020',
  'https': 'http://username:password@gateway.ipipgo.com:9020'
}

resp = requests.get('https://example.com/products', proxies=proxies)
soup = BeautifulSoup(resp.text, 'html.parser')

 Grab price tags
price_tags = soup.select('div.price-box span.special-price')
for tag in price_tags.
    print(tag.text.strip())

Third, the proxy IP practical skills of the book

Here's the point!I've personally stepped in these potholes:

Remember to add exception handling to your code:

try.
    resp = requests.get(url, proxies=proxies, timeout=10)
except requests.exceptions.ProxyError: print("Go to the ipipgo backend and change proxies!
    ProxyError: print("Go to the ipipgo backend and switch proxies!")
     Logic for automatic proxy switching...

IV. QA First Aid Kit

Q: What can I do about slow proxy IPs?
A: Go with ipipgo'sExclusive High Speed Access, remember to use their smart routing feature to automatically pick the fastest node.

Q: What should I do if I encounter a CAPTCHA attack?
A: ipipgo's high-quality residential agent + request frequency control two-pronged, with the coding platform for better results.

Q: What do I do when I need a lot of IP resources?
A: Directly on ipipgo'sDynamic IP Pool ServiceIt supports switching of 500+ different geographical IP addresses per second.

V. Upgrade your collection program

A tip for older drivers: integrate ipipgo's API into the crawler system and make a smart scheduling module. For example, like this:

import random
from ipipgo_client import IPPool hypothetical SDK

def get_proxy().
    pool = IPPool(api_key="your key")
    available_ips = pool.get_ips(country='us', protocol='https')
    return random.choice(available_ips)

Finally nagging sentence, the structure of the webpage changes in three days, remember to use ipipgo'sRequest Retry MechanismIf you have any questions, you can directly call their technical support, and the response rate is better than a takeout boy. What do not understand can directly call their technical support, response speed faster than a takeaway boy!