spider | python crawler spider | Crawler library

by jhao104 Python Version: Current License: No License

X-Ray Key Features Code Snippets(3)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | spider Summary

spider is a Python library typically used in Automation, Crawler applications. 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.

python crawler spider

Support

Quality

Security

License

Reuse

Support

spider has a low active ecosystem.

It has 72 star(s) with 27 fork(s). There are 9 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 0 have been closed. On average issues are closed in 872 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of spider is current.

Quality

spider has 0 bugs and 0 code smells.

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.

License

spider does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

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.

spider saves you 15 person hours of effort in developing the same functionality from scratch.

It has 43 lines of code, 3 functions and 2 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.

Get HTML fromku .
Executes a JavaScript code string .
Parse a cookie string .

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 .

python

Lines of Code : 7

License : Permissive (MIT License)

Copy

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 .

python

Lines of Code : 7

License : Permissive (MIT License)

Copy

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 .

python

Lines of Code : 5

License : Permissive (MIT License)

Copy

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

Trending Discussions on spider

Scrapy form not submitting properly

Clearing a Component on Callback in Dash

How can I assign a variable from column 2 when running a loop of values in column 1 (same ROW value)

How to check if webpages contain X and then get their URL using wget

Unable to create an object of type 'ApplicationDbContext'. Ef core 5.0

Scrapy contracts 101

I want the created h3 to each contain a different sentence, however if you click the same h3 it should give the same sentence (Per page load of course

handling timeout in wget

How to avoid "module not found" error while calling scrapy project from crontab?

How to use a global defined variable in scrapy-spider?

QUESTION

Scrapy form not submitting properly

Asked 2021-Jun-16 at 01:24

I want to submit the form with the 5 data that's on the below. By submitting the form, I can get the redirection URL. I don't know where is the issue. Can anyone help me to submit the form with required info. to get the next page URL.

Code for your reference:

...

ANSWER

Answered 2021-Jun-16 at 01:24

Okay, this should do it.

Source https://stackoverflow.com/questions/67992556

QUESTION

Clearing a Component on Callback in Dash

Asked 2021-Jun-15 at 01:54

So I have this dash app where I want to display a png image based on the user's input. It works, but the problem is every time the user makes a selection the image is shown on top of the previous image. I want to somehow clear the previous image so it only shows the most recently selected image.

In app.layout I have:

...

ANSWER

Answered 2021-Jun-14 at 23:36

To update existing image you should use html.Img(...) instead of html.Div(..., children=[]) in app.layout, and update component_property='src' instead of component_property='children'

Many tools can save image/file in file-like object created in memory with io.BytesIO()

Example for matplotlib

Source https://stackoverflow.com/questions/67977585

QUESTION

How can I assign a variable from column 2 when running a loop of values in column 1 (same ROW value)

Asked 2021-Jun-14 at 13:45

I will explain the goal in more detail, The point of the script is to check (product code)values in column A on a supplier website, if the product is available, the loop checks the next value.

If the product is not on the site, a JSON PUT request is sent to a different sales website that sets the inventory level at 0.

The issue is how to assign the value in column B of the same CSV file to the PUT request

CSV file

...

ANSWER

Answered 2021-Jun-14 at 13:45

From scrapy’s documentation Passing additional data to callback functions, you basically want to pass the code to the data callback in Request’s cb_kwargs argument,

To get all codes, you could iterate on (COL-A, COL-B) pairs, not simply on COL-A values. Here we return the 2d numpy array, thus the list of rows, where each row is the COL-A, COL-B pair:

Source https://stackoverflow.com/questions/67949710

QUESTION

How to check if webpages contain X and then get their URL using wget

Asked 2021-Jun-14 at 07:56

I wanted to spider a website and, if some text or a matching pattern is found in the HTML, get the URL(s) of the page(s).

Wrote the command

...

ANSWER

Answered 2021-Jun-14 at 07:56

spider a website and, if some text or a matching pattern is found in the HTML

This is impossible with wget --spider. wget manual says that when you use --spider

When invoked with this option, Wget will behave as a Web spider, which means that it will not download the pages, just check that they are there. For example, you can use Wget to check your bookmarks:

wget --spider --force-html -i bookmarks.html

This feature needs much more work for Wget to get close to the functionality of real web spiders.

wget with --spider option does fetch response headers, which you can print following way

Source https://stackoverflow.com/questions/67953037

QUESTION

Unable to create an object of type 'ApplicationDbContext'. Ef core 5.0

Asked 2021-Jun-13 at 12:31

I using CleanArchitecture solution. I have Data layer where ApplicationDbContext and UnitOfWork are located :

...

ANSWER

Answered 2021-Jun-13 at 12:31

finally, I found my answers in this article https://snede.net/you-dont-need-a-idesigntimedbcontextfactory/

Create ApplicationDbContextFactory in Portal.Data project:

Source https://stackoverflow.com/questions/67907439

QUESTION

Scrapy contracts 101

Asked 2021-Jun-12 at 00:19

I'd like to give a shot to using Scrapy contracts, as an alternative to full-fledged test suites.

The following is a detailed description of the steps to duplicate.

In a tmp directory

...

ANSWER

Answered 2021-Jun-12 at 00:19

With @url http://www.amazon.com/s?field-keywords=selfish+gene I get also error 503.

Probably it is very old example - it uses http but modern pages use https - and amazone could rebuild page and now it has better system to detect spamers/hackers/bots and block them.

If I use @url http://toscrape.com/ then I don't get error 503 but I still get other error FAILED because it needs some code in parse()

@scrapes Title Author Year Price means it has to return item with keys Title Author Year Price

Source https://stackoverflow.com/questions/67940757

QUESTION

I want the created h3 to each contain a different sentence, however if you click the same h3 it should give the same sentence (Per page load of course

Asked 2021-Jun-11 at 20:59

Please excuse the use of var, it is part of the challenge and is intended to help me learn about closure. Currently, the code gives all 100 h3's the same sentence. I've tried moving the randomName, randomWeapon, and randomLocation variables into the addEvent function. When I do this I assign the same h3 a new sentence on every click. I'm guessing I need to use .call or .apply, but I am new to functions, and internet tutorials just aren't getting me there.

...

ANSWER

Answered 2021-Jun-11 at 20:59

The problem is that your addEvent bind the click hander on the body and not on the h3. And the second is that you do e.preventDefault when you have not defined e (you should set it on the click handler,not the addEvent function) which causes an error and stops the execution.

If you had fixed the e issue, you would see that when you click on an h3 you get all 100 alerts.

Try changing

Source https://stackoverflow.com/questions/67943267

QUESTION

handling timeout in wget

Asked 2021-Jun-09 at 08:53

I have a bash script that checks if the CHECKURL variable has a response or not. If the url is not valid or doesn't exist the script immediately exits and echo a message "NOT VALID URL"

I have one problem in which the url https://valid-url-sample.com is a valid url however my IP is rejected on the load balancer because it only respond on 443 request from specific IP's. The result is the script stays running until I it requires me to control+c. I would like the script to handle this kind of condition and echoes "VALID BUT NOT REACHABLE", I also added timeout on the wget command but still no luck. any thoughts on how to handle this?

SCRIPT

...

ANSWER

Answered 2021-Jun-09 at 08:53

You probably want to use a log file like this:.

Source https://stackoverflow.com/questions/67898996

QUESTION

How to avoid "module not found" error while calling scrapy project from crontab?

Asked 2021-Jun-07 at 15:35

I am currently building a small test project to learn how to use crontab on Linux (Ubuntu 20.04.2 LTS).

My crontab file looks like this:

* * * * * sh /home/path_to .../crontab_start_spider.sh >> /home/path_to .../log_python_test.log 2>&1

What I want crontab to do, is to use the shell file below to start a scrapy project. The output is stored in the file log_python_test.log.

My shell file (numbers are only for reference in this question):

...

ANSWER

Answered 2021-Jun-07 at 15:35

I found a solution to my problem. In fact, just as I suspected, there was a missing directory to my PYTHONPATH. It was the directory that contained the gtts package.

Solution: If you have the same problem,

Find the package

I looked at that post

Add it to sys.path (which will also add it to PYTHONPATH)

Add this code at the top of your script (in my case, the pipelines.py):

Source https://stackoverflow.com/questions/67841062

QUESTION

How to use a global defined variable in scrapy-spider?

Asked 2021-Jun-07 at 07:37

How could I use a global defined variable (pandas data frame) df within a scrapy-spider?

...

ANSWER

Answered 2021-Jun-07 at 07:37

You need to declare variable inside class, if you want to initialize do that in constructor.

Source https://stackoverflow.com/questions/67866759

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 .

Find more information at: