Spiders | 微博关键词搜索爬虫、微博爬虫、链家房产爬虫、新浪新闻爬虫、腾讯招聘爬虫、招投标爬虫
kandi X-RAY | Spiders Summary
kandi X-RAY | Spiders Summary
微博关键词搜索爬虫、微博爬虫、链家房产爬虫、新浪新闻爬虫、腾讯招聘爬虫、招投标爬虫
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Top functions reviewed by kandi - BETA
- Verify proxies
- Get ip address
- Get the time difference between start and end
- Read a text file
- Run the captcha
- Check if two images are equal
- Check if two images are equal
- Returns the number of images in image
- Find ip address
- Return headers as a list
- Check ip
- Write text to file
- Process an item
- Insert item into collection
- Process the item
- Compare two time series
- Create a cqlianjia txt file
- Creates a txt file
- Process response
- Get a random proxy
- Process a single item
- Generate random proxy
Spiders Key Features
Spiders Examples and Code Snippets
Community Discussions
Trending Discussions on Spiders
QUESTION
According to SO I wrote a spider to save each domain to a separate json file. I have to use CrawlSpider to use Rules for visiting sublinks.
But the file contains json data that cannot be read by pandas. It should have a nice and readable new line separated json. But Scrapy expects the exported json to be byte like.
The desired output format is:
...ANSWER
Answered 2022-Mar-30 at 17:21You should use JsonLinesItemExporter instead of JsonItemExporter to get every item in separated line.
And don't bother bytes because documentation mentions that it has to open file in bytes mode.
And in pandas.read_json() you can use option lines=True to read JSONL (multiline-JSON):
QUESTION
I built a web-crawler, here is an example of one of the pages that it crawls:
https://www.baseball-reference.com/register/player.fcgi?id=buckle002jos
I only want to get the rows that contain 'NCAA' or 'NAIA' or 'NWDS' in them. Currently the following code gets all of the rows on the page and my attempt at filtering it does not quite work.
Here is the code for the crawler:
...ANSWER
Answered 2022-Mar-06 at 20:20Problem is because you check
QUESTION
ANSWER
Answered 2022-Mar-05 at 03:23To show in a loop, you can use the following xpath to receive that data point:
QUESTION
I have a problem with a Scrapy Python program I'm trying to build. The code is the following.
...ANSWER
Answered 2022-Feb-24 at 02:49You have two issues with your code. First, you have two Rules in your crawl spider and you have included the deny restriction in the second rule which never gets checked because the first Rule follows all links and then calls the callback. Therefore the first rule is checked first and therefore it does not exclude the urls you don't want to crawl. Second issue is that in your second rule, you have included the literal string of what you want to avoid scraping but deny expects regular expressions.
Solution is to remove the first rule and slightly change the deny argument by escaping special regex characters in the url such as -. See below sample.
QUESTION
I am trying to scrape all the urls in websites like https://www.laphil.com/ https://madisonsymphony.org/ https://www.californiasymphony.org/ etc to name the few. I am getting many urls scraped but not getting complete urls related to that domain. I am not sure why it is not scraping all the urls.
code
items.py
...ANSWER
Answered 2022-Jan-22 at 19:26spider.py:
QUESTION
I have the following scrapy CrawlSpider:
ANSWER
Answered 2022-Jan-22 at 16:39Taking a stab at an answer here with no experience of the libraries.
It looks like Scrapy Crawlers themselves are single-threaded. To get multi-threaded behavior you need to configure your application differently or write code that makes it behave mulit-threaded. It sounds like you've already tried this so this is probably not news to you but make sure you have configured the CONCURRENT_REQUESTS and REACTOR_THREADPOOL_MAXSIZE.
https://docs.scrapy.org/en/latest/topics/settings.html?highlight=thread#reactor-threadpool-maxsize
I can't imagine there is much CPU work going on in the crawling process so i doubt it's a GIL issue.
Excluding GIL as an option there are two possibilities here:
- Your crawler is not actually multi-threaded. This may be because you are missing some setup or configuration that would make it so. i.e. You may have set the env variables correctly but your crawler is written in a way that is processing requests for urls synchronously instead of submitting them to a queue.
To test this, create a global object and store a counter on it. Each time your crawler starts a request increment the counter. Each time your crawler finishes a request, decrement the counter. Then run a thread that prints the counter every second. If your counter value is always 1, then you are still running synchronously.
QUESTION
My main goal is to scrape content from the table from this site
...ANSWER
Answered 2022-Jan-16 at 19:41To extract the data from the Transfers table of Token Natluk Community - polygonscan webpage you need to induce WebDriverWait for the visibility_of_element_located() and using DataFrame from Pandas you can use the following Locator Strategy:
Code Block:
QUESTION
How my spawning in script should work is there is a large cube (250 by 250 by 250) and it has a box collider with the trigger enabled. Each mob has a value which is their health/10. My goal is to make it so that each area has a value of 100 and if it has less than that it will randomly spawn in a new mob until it goes back to 100 value. I am getting an error on the line that I am instantiating the mob on that it is giving a null reference exception error. I have assigned the enemy gameobjects in the instpector. I am purposfully not spawning in the spiders because I am doing something special for them. If there is any code you need just comment and I should be able to give it to you. Thank you
Edit: I also got an null reference exception error on start on the line where I am adding the Alk to the Enemies list
Edit: In this scene there are no other objects that would interfere with the spawning in because I disabled all of the other objects one by one and I got no errors. All of the values in the enemy base script that are related to this have values that have been assigned to them. I hope that helps narrow it down
Here is my code:
...ANSWER
Answered 2022-Jan-14 at 22:46I realized that when enemies were spawning in the area value wouldnt go back up becuase there wasnt anything adding to the value when they spawned in. I also optimized the code a bit more.
I was able to fix it by doing this:
QUESTION
I am trying to use Scrapy with Django so I defined the following custom management command:
ANSWER
Answered 2022-Jan-03 at 08:08The server isn't started, it's checked by django automatically.
This behavior can be disabled by setting requires_system_checks to False like so;
QUESTION
I am following the youtube video https://youtu.be/s4jtkzHhLzY and have reached 13:45, when the creator runs his spider. I have followed the tutorial precisely, yet my code refuses to run. This is my actual code. I imported scrapy too as well. Can anyone help me figure out why scrap refuses to acknowledge my spider? The file is in the correct 'spider' file. I am so confused rn.
...ANSWER
Answered 2021-Dec-29 at 06:33spider_name = 'whiskey' should be name = 'whiskey'
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
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Install Spiders
You can use Spiders like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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