web-crawler | Python Web Crawler with Selenium and PhantomJS | Crawler library
kandi X-RAY | web-crawler Summary
kandi X-RAY | web-crawler Summary
This python web crawler will read in a configuration file containing seed URLs to crawl, and download filtering parameters. The program will then crawl each seed URL in succession and add any subsequently found URLs to a queue of URLs to visit. As each URL is visited, if it satisfies the given filtering parameters, it will be downloaded while maintaining the directory structure of the website. The value of URLs to visit will thus grow initially, round off when no new URLs are being discovered, and eventually shrink down to zero, at which point the program will move on to the next seed URL, or exit if there are no more URLs to process. Pages that return only Javascript with a text/html mimetype will be requested again with Selenium using the PhantomJS browser. Additional functionality is available to handle an input file containing a list of files to download.
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Top functions reviewed by kandi - BETA
- Send a request
- Add headers to the request
- Extract cookies from a response
- Build a response object
- Create a new HTTPS connection
- Releases the connection back to the pool
- Decompress the given data
- Read data from the stream
- Select an element by its text
- Handle a 401 request
- Captures an entire page
- Get confirmation
- Return a generator of the available encodings
- Try to get a unicode from a response
- The read timeout in seconds
- Parse a list header
- Lookup a builder for a given list of features
- Wraps an SSL socket
- Create headers dict
- Feed the input buffer
- Select a window
- Unzip a zip file
- Create a new socket connection
- Send key to element
- Create a Color from a string
- Connects to the server
web-crawler Key Features
web-crawler Examples and Code Snippets
Community Discussions
Trending Discussions on web-crawler
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
I have been working on a small project which is a web-crawler template. Im having an issue in pycharm where I am getting a warning Unresolved attribute reference 'domain' for class 'Scraper'
ANSWER
Answered 2021-May-24 at 17:45Just tell yrou Scraper class that this attribut exists
QUESTION
I'm working on a web-crawler in python for my tennisclub to save game-result, ranks etc. from a webpage in my database (to then show it on my own website). Works just fine, I get tables like this:
However, some team-names are way to long to output them nicely on my website (especially when two clubs together).
My question is: how can I cut everything behind the "/" with pandas if a string reaches a certain length, like 34.
My code so far (with other, working, changes to the crawled information):
...ANSWER
Answered 2021-May-23 at 09:29Since you mentioned that length would be more than 34 only if there are more than 1 team, so simple solution would be to check the length first, if more than 34, then do a split at / and get the first team:
QUESTION
I am trying to make a background web-crawler in python. I have managed to write the code for it and then I used the pythonw.exe app to execute it without any console window. Also, I ran ChromeDriver in headless mode.
The problem is, it still produces a console window for the ChromeDriver which says $ DevTools listening on ...some address.
How can I get rid of this window?
...ANSWER
Answered 2020-Aug-25 at 18:46Even if you make the script as .pyw, when the new process chromedriver.exe is created, a console window appears for that. There is an option to turn on the option CREATE_NO_WINDOW in C#, but there is not one yet in Python bindings for selenium. I was planning to fork selenium and add this feature myself.
Go to this folder: C:\Users\name\AppData\Local\Programs\Python\Python38-32\Lib\site-packages\selenium\webdriver\common\ (The path till Python38-32 depends on your installation of python).
There will be a file named service.py, which you need to edit as follows:
- Add the import statement at the top
from subprocess import STDOUT, CREATE_NO_WINDOW - Now (maybe in the line numbers 72 to 76), you must add another option
creationflags=CREATE_NO_WINDOWin the functionsubprocess.Popen(). To make it clear, see before and after versions of code below:
Before edit:
QUESTION
W.r.t. Łukasz' tutorial on Youtube for a simple web-crawler, the following code gives RuntimeError: Event loop is closed. This happens after the code runs successfully and prints out the time taken to complete the program.
ANSWER
Answered 2020-Aug-03 at 10:23Resolved from pointer given by @user4815162342 - being tracked in this issue
QUESTION
My goal is to create a kind of web-crawler in dart. For this I want to maintain an task queue where the elements are stored that need to be crawled (e.g URLs). The elements are crawled within the crawl function which returns a List of more elements that need to be processed. Thus these elements are added to the queue. Example code:
...ANSWER
Answered 2020-Jul-14 at 10:20I don't know if there are already a package there gives this functionality but since it is not that complicated to write you own logic I have made the following example:
QUESTION
I'm working with puppeteer at the moment to create a web-crawler and face the following problem:
The site I'm trying to scrape information off of uses Tabs. It renders all of them at once and sets the display-property of all but one tab to 'none' so only one tab is visible.
The following code always gets me the first flight row, which can be hidden depending on the date that the crawler is asking for.
...ANSWER
Answered 2020-Jul-14 at 08:47const flightData = await page.$eval('.available-flights .available-flight.row:not([style*="display:none"]):not([style*="display: none"])', (elements) => {
// code to handle rows
}
QUESTION
If I do
...ANSWER
Answered 2020-Feb-18 at 12:27you are writing the code for python 2 but running it in python 3 you are missing the brackets,here is the way to do it
QUESTION
I'm calling a method in another class and I'm getting the following error. This is the class that declares & defines the method:
...ANSWER
Answered 2020-Feb-09 at 04:12Instance methods are implicitly passed the instance as the first argument (self). That means crawler.crawl(web) gets turned into WebCrawler.crawl(crawler, web).
I'm not sure how to fix it since I'm not familiar with these modules, but I would guess that crawl is supposed to take an argument, since WebCrawler doesn't have a root method:
QUESTION
I am trying to build a web-crawler for a specific website. But for some reason I won't connect to the website. I get a error (made myself) it can't connect. Using selesium tot call up the website, I see it doesn't connect
As a newbie I am probably making a stupid mistake but I can't figure out what. Hoping you are willing to help me.
...ANSWER
Answered 2020-Jan-06 at 16:35I see you fixed EC.presence_of_element_located((By.ID,{'class':'result-content'})) to be EC.presence_of_element_located((By.CLASS_NAME,'result-content')))
Next, you might have an issue with (depending where the browser is opened) of having to bypass/clicking a javascript that says you are ok and accept cookies.
But all that code seems to be an awful lot of work considering the data is stored as a json format in the script tags from the html. Why not just simply use requests, pull out the json, convert to dataframe, then write to csv?
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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No vulnerabilities reported
Install web-crawler
You can use web-crawler 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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