spider | 支持多线程多进程爬虫,速度很快,百度知道每天产生一千万的解析数据

 by   yue6121 Python Version: Current License: No License

kandi X-RAY | spider Summary

kandi X-RAY | spider Summary

spider is a Python library. spider has no bugs, it has no vulnerabilities and it has low support. However spider build file is not available. You can download it from GitHub.

spider
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            kandi-support Support

              spider has a low active ecosystem.
              It has 7 star(s) with 0 fork(s). There are 1 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              spider has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of spider is current.

            kandi-Quality Quality

              spider has 0 bugs and 0 code smells.

            kandi-Security Security

              spider has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              spider code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              spider does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              spider releases are not available. You will need to build from source code and install.
              spider has no build file. You will be need to create the build yourself to build the component from source.
              It has 804 lines of code, 8 functions and 5 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed spider and discovered the below as its top functions. This is intended to give you an instant insight into spider implemented functionality, and help decide if they suit your requirements.
            • Parse HTML content .
            • Parses a pq file .
            • get content
            • Download content to url .
            Get all kandi verified functions for this library.

            spider Key Features

            No Key Features are available at this moment for spider.

            spider Examples and Code Snippets

            Process an exception raised by spider middleware .
            pythondot img1Lines of Code : 7dot img1License : Permissive (MIT License)
            copy iconCopy
            def process_spider_exception(response, exception, spider):
                    # Called when a spider or process_spider_input() method
                    # (from other spider middleware) raises an exception.
            
                    # Should return either None or an iterable of Response,   
            Process spider output .
            pythondot img2Lines of Code : 7dot img2License : Permissive (MIT License)
            copy iconCopy
            def process_spider_output(response, result, spider):
                    # Called with the results returned from the Spider, after
                    # it has processed the response.
            
                    # Must return an iterable of Request, dict or Item objects.
                    for i in resu  
            Create a spider from a given crawler .
            pythondot img3Lines of Code : 5dot img3License : Permissive (MIT License)
            copy iconCopy
            def from_crawler(cls, crawler):
                    # This method is used by Scrapy to create your spiders.
                    s = cls()
                    crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
                    return s  

            Community Discussions

            QUESTION

            How to correclty loop links with Scrapy?
            Asked 2022-Mar-03 at 09:22

            I'm using Scrapy and I'm having some problems while loop through a link.

            I'm scraping the majority of information from one single page except one which points to another page.

            There are 10 articles on each page. For each article I have to get the abstract which is on a second page. The correspondence between articles and abstracts is 1:1.

            Here the divsection I'm using to scrape the data:

            ...

            ANSWER

            Answered 2022-Mar-01 at 19:43

            The link to the article abstract appears to be a relative link (from the exception). /doi/abs/10.1080/03066150.2021.1956473 doesn't start with https:// or http://.

            You should append this relative URL to the base URL of the website (i.e. if the base URL is "https://www.tandfonline.com", you can

            Source https://stackoverflow.com/questions/71308962

            QUESTION

            Scrapy exclude URLs containing specific text
            Asked 2022-Feb-24 at 02:49

            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 02:49

            You 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.

            Source https://stackoverflow.com/questions/71224474

            QUESTION

            Why does scrapy_splash CrawlSpider take the same amount of time as scrapy with Selenium?
            Asked 2022-Jan-22 at 16:39

            I have the following scrapy CrawlSpider:

            ...

            ANSWER

            Answered 2022-Jan-22 at 16:39

            Taking 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:

            1. 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.

            Source https://stackoverflow.com/questions/70647245

            QUESTION

            How can I send Dynamic website content to scrapy with the html content generated by selenium browser?
            Asked 2022-Jan-20 at 15:35

            I am working on certain stock-related projects where I have had a task to scrape all data on a daily basis for the last 5 years. i.e from 2016 to date. I particularly thought of using selenium because I can use crawler and bot to scrape the data based on the date. So I used the use of button click with selenium and now I want the same data that is displayed by the selenium browser to be fed by scrappy. This is the website I am working on right now. I have written the following code inside scrappy spider.

            ...

            ANSWER

            Answered 2022-Jan-14 at 09:30

            The 2 solutions are not very different. Solution #2 fits better to your question, but choose whatever you prefer.

            Solution 1 - create a response with the html's body from the driver and scraping it right away (you can also pass it as an argument to a function):

            Source https://stackoverflow.com/questions/70651053

            QUESTION

            Nodejs combine request 2 sessions
            Asked 2022-Jan-13 at 18:02

            I have an app that store data of multiple users in stormdb for example

            User A Login and send some requests and i will log it in his table And User B Login and send some requests and i will log it in his table

            the issue in here when both send requests the database log user request one for all users

            code example

            ...

            ANSWER

            Answered 2022-Jan-13 at 18:02

            There is an Global variable in your code that works same thing for all users , you need to remove that global variable .

            Source https://stackoverflow.com/questions/70570088

            QUESTION

            Node Js : How to read and update json file
            Asked 2021-Dec-28 at 01:01

            Hello I am a new coder but I am having troubles trying to add a new user (req) to a json file of users I have for a fake bank. I'm more confused on the type of object these are and how to access them from data. I would appreciate any words of advice. Currently I can only add the new account in, but it replaces the other users in the file. So now I'm trying to add the old users and the new users before I import but I am unsure how. My main area on confusion is how to access and manipulate the "data" from fs.readfile

            ...

            ANSWER

            Answered 2021-Dec-28 at 01:01

            This is the key problem:

            Source https://stackoverflow.com/questions/70501517

            QUESTION

            Succinctly Reproducing the following graph with R and ggplot2
            Asked 2021-Dec-27 at 22:55

            I borrowed the R code from the link and produced the following graph:

            Using the same idea, I tried with my data as follows:

            ...

            ANSWER

            Answered 2021-Dec-27 at 22:55

            You can do calculations within a function for the x and y values to construct the ggplot which extends the circle all the way round and gives labels correct heights.

            I've adapted a function to work with other datasets. This takes a dataset in a tidy format, with:

            • a 'year' column
            • one row per 'event'
            • a grouping variable (such as country)

            I've used Nobel laurate data from here as an example dataset to show the function in practice. Data setup:

            Source https://stackoverflow.com/questions/70393322

            QUESTION

            Why when I trying to make a function that delete books from my library I get an Error?
            Asked 2021-Dec-22 at 23:22

            Example of book that I want to delete from the books_library (depends on the book name (input)):

            {'Books': [{"Book's ID": {'001'}, "Book's Name": {'Avengers'}, "Book's Authors": {'Stan Lee'}, "Book's Published year": {'1938'}, "Book's Type": {'1'}, "Book's Copies": {'10'}}, {"Book's ID": {'002'}, "Book's Name": {'Spider Man'}, "Book's Authors": {'Stan Lee'}, "Book's Published year": {'1948'}, "Book's Type": {'2'}, "Book's Copies": {'15'}}]}

            The function i'm using:

            ...

            ANSWER

            Answered 2021-Dec-22 at 22:49

            QUESTION

            Scrapy display response.request.url inside zip()
            Asked 2021-Dec-22 at 07:59

            I'm trying to create a simple Scrapy function which will loop through a set of standard URLs and pull their Alexa Rank. The output I want is just two columns: One showing the scraped Alexa Rank, and one showing the URL which was scraped.

            Everything seems to be working except that I cannot get the scraped URL to display correctly in my output. My code currently is:

            ...

            ANSWER

            Answered 2021-Dec-22 at 07:59

            Here zip() takes 'rank' which is a list and 'url_raw' which is a string so you get a character from 'url_raw' for each iteration.

            Solution with cycle:

            Source https://stackoverflow.com/questions/70440363

            QUESTION

            Yielding values from consecutive parallel parse functions via meta in Scrapy
            Asked 2021-Dec-20 at 07:53

            In my scrapy code I'm trying to yield the following figures from parliament's website where all the members of parliament (MPs) are listed. Opening the links for each MP, I'm making parallel requests to get the figures I'm trying to count. I'm intending to yield each three figures below in the company of the name and the party of the MP

            Here are the figures I'm trying to scrape

            1. How many bill proposals that each MP has their signature on
            2. How many question proposals that each MP has their signature on
            3. How many times that each MP spoke on the parliament

            In order to count and yield out how many bills has each member of parliament has their signature on, I'm trying to write a scraper on the members of parliament which works with 3 layers:

            • Starting with the link where all MPs are listed
            • From (1) accessing the individual page of each MP where the three information defined above is displayed
            • 3a) Requesting the page with bill proposals and counting the number of them by len function 3b) Requesting the page with question proposals and counting the number of them by len function 3c) Requesting the page with speeches and counting the number of them by len function

            What I want: I want to yield the inquiries of 3a,3b,3c with the name and the party of the MP in the same raw

            • Problem 1) When I get an output to csv it only creates fields of speech count, name, part. It doesn't show me the fields of bill proposals and question proposals

            • Problem 2) There are two empty values for each MP, which I guess corresponds to the values I described above at Problem1

            • Problem 3) What is the better way of restructuring my code to output the three values in the same line, rather than printing each MP three times for each value that I'm scraping

            ...

            ANSWER

            Answered 2021-Dec-18 at 06:26

            This is happening because you are yielding dicts instead of item objects, so spider engine will not have a guide of fields you want to have as default.

            In order to make the csv output fields bill_prop_count and res_prop_count, you should make the following changes in your code:

            1 - Create a base item object with all desirable fields - you can create this in the items.py file of your scrapy project:

            Source https://stackoverflow.com/questions/70399191

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install spider

            You can download it from GitHub.
            You can use spider 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.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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            https://github.com/yue6121/spider.git

          • CLI

            gh repo clone yue6121/spider

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            git@github.com:yue6121/spider.git

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