John, Great tutorial... many thanks... now I know how to juggle... ;) Wanted to pass on an observation... apparently, Windows, can be cranky with asyncio/aiohttp. Your example program throws a “RuntimeError: Event loop is closed ” error. However, adding towards the bottom: asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy()) … on top of pages = asyncio.run(main(urls)) … solves whatever 'Event loop' issues that were present.
@rtxmax82233 жыл бұрын
yes i was working on the async request and I got the similar error, the only way it works for me is if my program keeps on running. Since I am doing a constant request response after one ends, i dont get this error. but when I run my program for only one page to scrap then I get this error.
@luxeave2 жыл бұрын
@Rasstag, dude ur a life saver. well done!
@Valentin439 Жыл бұрын
Thank man!
@efferington2 жыл бұрын
Hi John, thank you very much for this. Found this video while trying to figure out how to include an async AIOHTTP loop in some API processing script I'm writing and this was invaluable for figuring out how to structure the code.
@andres777video2 жыл бұрын
No requests from me... just love your videos John! - Thanks for spending the time... I need this code to pull data for 188,600 items (each one is a web page...with 3 tables each) - UIPath would take about 32 days to complete. - asyncio + aiohttp should be much, much faster! Thanks for the tip Rasstag ( had the same issue in Windows)
@JohnWatsonRooney2 жыл бұрын
thank you very much!
@a_private_handle Жыл бұрын
Great wallpaper from Firewatch
@yacinehechmi6012 Жыл бұрын
Thank you sir!!
@symbolminded5167 Жыл бұрын
Your video helped a lot, thank you
@nsnilesh6043 жыл бұрын
Awesome way to get list of urls 👌😎
@JohnWatsonRooney3 жыл бұрын
Thanks!
@tubelessHuma3 жыл бұрын
Always trying new ways of scraping. Great 👍🌹
@JohnWatsonRooney3 жыл бұрын
Thanks!
@fuad4713 жыл бұрын
Thank you it was really helpful to grasp the asyncio concept
@John Watson Rooney Good tutorial! Thanks! But the lines 23 to 26 are synchrone no?
@DerekMurawsky5 ай бұрын
Subscribed. What are your thoughts on going about it this way vs something like scrapy?
@JohnWatsonRooney5 ай бұрын
Honestly I use scrapy almost all the time now, unless it’s more of a throwaway script
@phudinhtruong2 жыл бұрын
great video
@serge20332 жыл бұрын
cool. thanks!!
@DarkPsychologyIQ3 жыл бұрын
Hi John, great videos by the way! I was wondering how can I scrape a website for the ASIN's, product title, stock levels and price?
@GelsYT2 жыл бұрын
So basically what's happening here in the whole program is that when on the event loop -- all of the tasks while the requests is being made, while it's waitiing it passes the resources to the other task functions? so on and so fort up until we got the response? I'm sorry if it's not that clear
@JohnWatsonRooney2 жыл бұрын
Yeah so basically instead of the whole program waiting for a server response it gets on doing other things, ie more requests out. It means there is minimal time spent waiting and maximum time spend doing
@GelsYT2 жыл бұрын
@@JohnWatsonRooney THANK YOU! To anyone who watches his videos and does not subscribe! PLEASE DO IT NOW! Thank you man! also please smile more! I like your beard! wish I have that as well
@GelsYT2 жыл бұрын
HEEY MAAAN RECENTLY WATCH YOUR VIDS ON SCRAPY! YOU'RE SAVING MY LIFE AGAIN! THANKS1
@Lorant19842 жыл бұрын
Where is the link for the video with "session objects", please?
@nachoeigu2 жыл бұрын
How could we use proxy dictionary with aiohttp?
@peterpann77782 жыл бұрын
Hi John, thanks alot for your wonderful vedios, I was wondering which is faster async or multithreading in webscraping?
@JohnWatsonRooney2 жыл бұрын
Thanks! Async is faster
@rangabharath42533 жыл бұрын
Awesome 👍😎
@JohnWatsonRooney3 жыл бұрын
Thanks!
@JesusTorres-bt2eb3 жыл бұрын
Thank you so much, I had learn a lot from your videos, I have a question, It is possible that there is a similar option for pages in cloudflare, I currently use cloudscraper, but it has bugs, do you recommend something?
@bighneswar982 жыл бұрын
The webpage that I'm trying to scrape using asyncio and aiohttp throws an error saying "return self._body.decode( # type: ignore[no-any-return,union-attr] UnicodeDecodeError: 'utf-8' codec can't decode bytes in position 25051-25052: invalid continuation byte" Was working fine in requests and html. What's the solution?
@nachoeigu2 жыл бұрын
If you shoud define the best module for web scraping in terms of efficience and robust, what would be? I know selenium, requests, HTMLSessions, aiohttp, AsyncHTMLSession, scrapy, among others. What do you recommend to focus in specifically for its completeness. Thank you for your content.
@JohnWatsonRooney2 жыл бұрын
Hi, requests-html is my go to for most smaller projects. Otherwise scrapy
@anto36173 жыл бұрын
Can you explain please how to scrap products price from webstore and send telegram alert when price drop? Thanks for you're video
@nachoeigu2 жыл бұрын
Wow, it is an amazing content. Thank you. I would like to know more about asyncio in Python. How did you learn it? Do you recommend some lecture or article?
@Suresh_Solution3 жыл бұрын
Bro how to scrape sciencedirect website
@7488nishant3 жыл бұрын
Your videos are very informative... Bro....can you make video on web scraping where cookies expires after 30 mins...example website like NSE etc
@rotatingmind Жыл бұрын
Cool tutorial. Just one question: what could we do, if we want to add new urls to the task list from the parsed results?
@KirillBezzubkine2 жыл бұрын
I wouldbreally appreciate an answer: i have to make about 10000 api requests but the api supports only about 50 calls at a time so i need to split the whole 10k range into chunks. How do i make async requests in batches.?
@mohfatkurrozi40693 жыл бұрын
Awesome... :-)
@alexsorrow61333 жыл бұрын
Where I can copy this code 🤷🏻♂️
@sadam322 жыл бұрын
Hi John, great tutorial again. What theme for VS Code is this? Best regards
@JohnWatsonRooney2 жыл бұрын
thanks- i believe that is GruvBox Material. i change a lot!
@hamidrezarahimi66513 жыл бұрын
Link to the quickstart page : docs.aiohttp.org/en/stable/client_quickstart.html
@powergaming-tu6wj2 жыл бұрын
ok so i have a question for you i have over 6000+ links and all i want to do is read the url get a one thing off the page and add it to the corelating link in google sheets any tips
@powergaming-tu6wj2 жыл бұрын
aka most of the items from the market on a game called runescape
@terrascape2 жыл бұрын
hi john , it would be great if you could reply, how do i go about returning the url for each iteration of the event loop?
@mlgen73 жыл бұрын
Thanks for these videos. I am starting my journey on web scraping because I want to try understanding my spend on Deliveroo. (a food delivery app - like uber eats). Some questions and cheekily a tutorial, if possible, would be to learn how to manage social login (I used to google login for Deliveroo) and then be able to go down a level to a page and gather the order history.
@akalamian3 жыл бұрын
Nice one, the third lesson learned here! Can you show some database lessons like we scraped 2 sites of shopify which have the same products, then do some price matching work to find the lowest price, thanks
@JohnWatsonRooney3 жыл бұрын
Good stuff! Yes I am planning on some more database related things to come
@akalamian3 жыл бұрын
@@JohnWatsonRooney absolutely great guide, just scrape 36000 product using 300s, just like a movie:)
@artabra10193 жыл бұрын
thanks .
@kimkelleher62553 жыл бұрын
Hey John!
@kimkelleher62553 жыл бұрын
Also, my next attempt will be grabbing one image from each of the 120k products. Is there a video for that? :)
@spicer412823 жыл бұрын
Nice! More tools in the chest! Thanks John. Any chance you can demo using an if-then-else scraping example? For example: If a set price or a range in price is found. Then scrape that object. Else, move on to the next page? Thanks for considering this request. Or, if you've done something similar in your previous Vids? Can you mention which ones? I've might've missed it... Thanks again!
@JohnWatsonRooney3 жыл бұрын
Sure sounds like a good idea I’ll have a look and see what I can come up with!
@KhalilYasser3 жыл бұрын
Thank you very much. I got this error `Traceback (most recent call last): File "aiohttp.py", line 34, in results = asyncio.run(main(urls)) File "C:\Users\Future\AppData\Local\Programs\Python\Python37\lib\asyncio unners.py", line 43, in run return loop.run_until_complete(main) File "C:\Users\Future\AppData\Local\Programs\Python\Python37\lib\asyncio\base_events.py", line 584, in run_until_complete return future.result() File "aiohttp.py", line 18, in main async with aiohttp.ClientSession() as session: AttributeError: module 'aiohttp' has no attribute 'ClientSession'`. Any ideas?
@KhalilYasser3 жыл бұрын
The problem occurred because the file name was aiohttp.py (It seems that causes conflict with the aiohttp module). I have put the solution so as to be a reference for others that may this problem happen with.
@JohnWatsonRooney3 жыл бұрын
Great glad you worked it out!
@yuvalbra3 жыл бұрын
can you publish the source code?
@mohfatkurrozi40693 жыл бұрын
How to fix error 403 Forbidden sir?
@JohnWatsonRooney3 жыл бұрын
Try different headers - user agents and cookies to see if that works
@mohfatkurrozi40693 жыл бұрын
@@JohnWatsonRooney yes sir, but i very confuse to fix it, can you some day or maybe later in the next videos. Made a easy to solve my problem forbidden 403.. Before for that.. Thank you sir.. Your replay my comment
@karthik-ex4dm3 жыл бұрын
One question...Since this is async, Will it wait for javascript to load fully before fetching the data from a page? Ex: If I put a brand filter in a ecommerce site which updates the page without loading it again, Will Aiohttp be able to fetch the updated the data ??
@manikandanmanickam94333 жыл бұрын
Can you show how to scrap form the delta airlines delta.com
@JohnWatsonRooney3 жыл бұрын
Sure I can have a look
@manikandanmanickam94333 жыл бұрын
@@JohnWatsonRooney thanks a lot John
@manikandanmanickam94333 жыл бұрын
Hai John, can you do example for scrap the Google search results with 15 results.(heading, url, content)
@artabra10193 жыл бұрын
grequests is not working ?? i try treturns me none.
@artabra10193 жыл бұрын
wers the source code
@thekarthik3 жыл бұрын
You're the best
@JohnWatsonRooney3 жыл бұрын
Thank you!
@MEZHGANO Жыл бұрын
This library is great. But how can we pass rich cookies with "path, expires, secure... etc", not just simple "key:value"? I found that documentation is extremely poor in terms of cookies.
@celerystalk3903 жыл бұрын
Your videos and topics just keep getting better. Great job!
@jithin.johnson2 жыл бұрын
Great tutorial! How do we get around with the IP bans? Bombing the sever with async requests often gets me banned.
@JohnWatsonRooney2 жыл бұрын
Thanks! Yes you will need to use some good proxies to avoid the bans. Or I find async is great for getting data from multiple different sites at the same time
@OprichnikStyle2 жыл бұрын
why did you put the await in return await r.text? I had to take it out in roder for my code to work
@justindi60613 жыл бұрын
I've learned a lot about scraping through your videos! What is the chances of getting blocked if I host my script on a server and scrape a website multiple times a day? Should I be implementing proxy rotation or can I get away without it?
@JohnWatsonRooney3 жыл бұрын
Thanks Justin! It depends on how often is multiple times and how many requests you are making. I’d say try it first and see if you start to run into issues
@Rani-wm1qq3 жыл бұрын
Ive been trying to use Selenium to Parse the Name and Price of some coins in a crypto exchange i use very often. But i keep getting this error. driver.find_element_by_xpath("//*[@id="root"]/div/div/div/div[3]/div[2]/div/form/input").click() What do i do
@Антмара Жыл бұрын
Hi John. Thank you for your video. Just one question: Is it possible to make def Pars to be asynсhronous too? I need two functions: first gets links for product card pages from 30 pages of site, and second function uses that links to get products price and other data from every card page. I have made first function asynсhronous and it works really quickly. I want second function o be asynсhronous too because the number of cards is more than 1000. But I still not know, how to gather these two functions together, how to create tasks for them both. Could you please give me your advise how to make it works
@nahomtsegaye3 жыл бұрын
you are a wizard my friend
@tnssajivasudevan16013 жыл бұрын
Great tutorial..Sir
@galichandreyschool2 жыл бұрын
Very good! :) Thank you!
@JohnWatsonRooney2 жыл бұрын
Thanks glad you enjoyed it
@DM-py7pj3 жыл бұрын
Will you do a trio video and cover nurseries please?
@mayurahir93403 жыл бұрын
Hello i am doing sum website scraping with one websit but i gating the one problem that website have an button function but when i click it it will give me a one name but wan i cloae the new tabe and reopen the page the name will button givea is hang every time than i can i scrape that Advance thanks and please help me 🙏