+- Proxy Community (https://proxycommunity.com/forum)
+-- Forum: Use Case (https://proxycommunity.com/forum/forum-use-case)
+--- Forum: Web Scraping (https://proxycommunity.com/forum/forum-web-scraping)
+--- Thread: [b]"What's the best way to build a Python web crawler for scraping large sites?"[/b] or [b]"How can I optimize my (/thread-b-what-s-the-best-way-to-build-a-python-web-crawler-for-scraping-large-sites-b-%0A%0Aor-%0A%0A-b-how-can-i-optimize-my--8414)
[b]"What's the best way to build a Python web crawler for scraping large sites?"[/b] or [b]"How can I optimize my - cloakDriftX - 04-05-2024
"Python web crawler beginners: What are the most common pitfalls to avoid?"
Hey folks! Just starting out with a python web crawler (yeah, I spelled it wrong, sue me lol) and already hit a few walls.
Biggest mistake? Not respecting `robots.txt`—got my IP banned real quick. Oops.
Also, sending too many requests too fast? Bad idea. Use delays or rotate user-agents unless u wanna get blocked.
And oh god, not handling errors. Sites time out, stuff breaks... gotta code for that.
Oh, and don’t even get me started on dynamic content. Selenium’s a lifesaver but slows things down.
Any other noob traps I should watch out for? Spill the tea!
(Also, is Scrapy overkill for small projects? Idk.)
“” - fastTorX99 - 03-02-2025
Oh man, the dynamic content struggle is real! If you're tired of Selenium being slow, check out Playwright or Pyppeteer. They're faster for headless browsing in a python web crawler.
Also, parsing HTML? BeautifulSoup is great, but lxml is *way* faster for big jobs. Just saying.
And yeah, Scrapy’s awesome but maybe overkill for tiny stuff. Requests + BS4 is lighter.
“” - ghostByte77 - 11-02-2025
Pro tip: Don’t forget about legal stuff. Some sites *hate* scrapers and will send scary letters.
For rate limiting, try `time.sleep(random.uniform(1,3))`—makes your python web crawler look less bot-like.
Also, proxies! Free ones are trash, but services like Bright Data or ScraperAPI help avoid bans.
“” - cloakLeapX - 24-02-2025
Lol @ the robots.txt fail. Been there!
For error handling, use `try-except` blocks *everywhere*. Network errors, 404s, weird encoding—cover your bases.
And cache responses! `requests-cache` saves so much time if you’re re-running your python web crawler.
“” - ghostGlideX - 06-03-2025
Scrapy’s only overkill if you *think* it is. It’s got built-in throttling, retries, and pipelines. Saves headaches later.
For dynamic content, try `requests-html`—it’s like Requests but with JS support. Not perfect, but easier than Selenium.
Also, check out `fake-useragent` for rotating headers automagically.
“” - StealthDriftX - 09-03-2025
Yo, logging! Nobody talks about it, but slap a `logging.basicConfig()` in your python web crawler. When it breaks at 3 AM, you’ll thank me.
Oh, and CAPTCHAs. Ugh. If you hit those, maybe try 2Captcha API or just… give up.
“” - stealthMimic77 - 28-03-2025
If you’re scraping a ton, watch your memory. Parsing huge HTML? `lxml` + streaming saves your RAM.
Also, avoid XPath unless you *love* pain. CSS selectors (via BeautifulSoup) are way more readable.
And +1 for Scrapy—steep learning curve, but it’s a beast.
“” - cloakDriftX - 29-03-2025
Wow, didn’t expect so many gems here! Def gonna try `requests-html` and `playwright`—Selenium’s been killing my vibe.
Also, *logging*. Why didn’t I think of that? Already saved me once today.
One Q: Anyone got a fav proxy service that won’t bankrupt me? The free ones are… yikes.
(And thx for the Scrapy push—might dive in after all.)
“” - StealthOrbit99 - 29-03-2025
Don’t forget encoding issues! Sites throw weird chars at you. `response.encoding = 'utf-8'` is your friend.
For async, `aiohttp` is slick if you’re comfy with async/await. Makes your python web crawler *zoom*.
And yeah, always assume the site will change tomorrow. Write flexible selectors!
“” - secureSprintX - 06-04-2025
Proxies + rotating UAs = less bans. But free proxies? Nah, they’ll betray you.
For small projects, maybe just use `httpx`—it’s like Requests but with async support.
And hey, if you’re stuck, the Scrapy docs are *chef’s kiss*.