The Complete Guide to Python Web Crawling: From the Basics to the Real World

What does a proxy IP really do? Let's take an example from the ground

Engaged in web crawling old iron understand, the site anti-climbing mechanism is like the subway security - the same face brush too many times the gate, immediately be security guards on the spot. At this time the proxy IP is your "vest", each visit to change the identity of the server will not recognize you as the same person.

For example, if you want to catch the price of an e-commerce platform, the local IP will be blocked for 20 consecutive requests. With ipipgo's dynamic proxy pool, each request automatically switches to a different region's IP, the success rate is directly doubled. Test data see here:

Hands-on with Python + Proxy IP

Install both libraries first and knock on the command line:

pip install requests
pip install fake_useragent

Here's the point! Use ipipgo's API to get the proxy, the code goes like this:

import requests

def get_ipipgo_proxy(): api_url =
    api_url = "https://api.ipipgo.com/getproxy?format=json"
    resp = requests.get(api_url).json()
    return f "http://{resp['ip']}:{resp['port']}"

 Example of real-world usage
proxies = {
    'http': get_ipipgo_proxy(),
    'https': get_ipipgo_proxy()
}

response = requests.get('destination URL', proxies=proxies, timeout=10)
print(response.text)

Watch out for two potholes:
1. Proxy format must be http://IP:端口, don't miss the protocol header
2. Timeout is recommended to be set within 10 seconds to prevent dead waiting.

Anti Anti Crawl Strategy 4 Piece Set

It's not enough to use agents alone, you have to work with these tricks:

from fake_useragent import UserAgent

headers = {
    'User-Agent': UserAgent().random, random UA
    'Accept-Language': 'zh-CN,zh;q=0.9' Chinese environment
}

 Randomize 3-8 seconds between each request
time.sleep(random.uniform(3,8))

ipipgo's IP pool comes withResidential Agentsrespond in singingData Center AgentsTwo types, to deal with different websites to be flexible to switch. For example, the official website of the enterprise mostly use residential IP, social media class with room IP is more cost-effective.

Practical: crawl a news site case

The target website changes its anti-crawl strategy every 30 minutes, our response plan:

1. Polling 5 ipipgo IP nodes per crawl
2. Automatically retry 3 times when encountering a 403 error
3. Reduced crawl frequency from 2-5am

Core code snippet:

retry_count = 0
while retry_count < 3:: retry_count = 0
    try: resp = requests.get(url)
        resp = requests.get(url, proxies=proxies, headers=headers)
        if resp.status_code == 200: if resp.status_code == 200: if resp.status_code == 200
            If resp.status_code == 200: break
    except Exception as e: proxies = get_ipip
        proxies = get_ipipgo_proxy() replace with new IPs
        retry_count +=1

Frequently Asked Questions QA

Q: What should I do if my proxy IP is slow?
A: Go with ipipgo'sHigh-speed exclusive accessThe latency is <200ms, don't use free proxies, it's as fast as a bicycle chasing a high speed train.

Q: How do I test if the agent is valid?
A: Test with a small script first:

test_url = 'http://httpbin.org/ip'
resp = requests.get(test_url, proxies=proxies)
print("Current proxy IP:", resp.json()['origin'])

Q: What should I do if I encounter a website asking me to log in?
A: with ipipgo'ssession holdFunction, the same IP to maintain cookie validity, need to contact customer service to open the

Why ipipgo?

Self-raised 3 million + real residential IP, covering 200 cities across the country. To give a chestnut, when you need to grab the weather data of a certain place, you can directly specify the exit IP of the city, and the data acquisition is more accurate. Their IP survival time is intelligently regulated, unlike some platforms where the IP expires in a few minutes.

Recently releasedIntelligent RoutingFunction more cattle, automatically identify the location of the target website server, prioritize the allocation of agent nodes in the same region. For example, to capture the website in Guangdong, the system automatically assigns the export IP of Shenzhen and Guangzhou, and the delay is reduced by more than 60%.

Finally said a true story: a do price system customers, before the use of ordinary proxy sealed 300 + times a day, changed to ip ipgo after a week only encountered 1 ban, the gap is visible to the naked eye. Engage in data capture friends, proxy IP this piece really can not save silver, choose the right service provider to double the efficiency is not fooled.