parsel | Java library for parsing HTML | Parser library
kandi X-RAY | parsel Summary
kandi X-RAY | parsel Summary
Parsel is a Java library for parsing HTML and XML to extract data using XPath selector. The project is inspired by Python's Parsel library.
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Top functions reviewed by kandi - BETA
- Apply XPath to the selector
- Return the nodeset for the given xpath
- Evaluates an XPath expression on the given node
- Flattens a node list into an array of Selectors
- Extracts all elements from the selector
- Size of the list
- Returns a Selector
- Creates a Node from the given string
- Returns a new DocumentBuilder instance
- Returns a string representation of the selector list
- Returns the String representation of this Selector
- Gets an array of strings matching the selector
- Execute the XPath expression on the document
- Return an array of doubles matching the predicate
- Execute an XPath expression on the document
- Get an array of all nodes matching the selector
- Get the node with the xpath
- Evaluates XPath expressions matching the selector
- Execute an XPath expression on a document
- Transform a Node into a String
- Return an array of nodes matching the selector
- Returns a new SelectorList with the specified index
- Removes the given percentage from the text
- Returns an SelectorList matching the XPath expression
parsel Key Features
parsel Examples and Code Snippets
Community Discussions
Trending Discussions on parsel
QUESTION
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 15:35I 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):
QUESTION
I want to install Scrapy on Windows Server 2019, running in a Docker container (please see here and here for the history of my installation).
On my local Windows 10 machine I can run my Scrapy commands like so in Windows PowerShell (after simply starting Docker Desktop):
scrapy crawl myscraper -o allobjects.json in folder C:\scrapy\my1stscraper\
For Windows Server as recommended here I first installed Anaconda following these steps: https://docs.scrapy.org/en/latest/intro/install.html.
I then opened the Anaconda prompt and typed conda install -c conda-forge scrapy in D:\Programs
ANSWER
Answered 2021-Apr-27 at 15:14To run a containerised app, it must be installed in a container image first - you don't want to install any software on the host machine.
For linux there are off-the-shelf container images for everything which is probably what your docker desktop environment was using; I see 1051 results on docker hub search for scrapy but none of them are windows containers.
The full process of creating a windows container from scratch for an app is:
- Get steps to manually install the app (scrapy and its dependencies) on Windows Server - ideally test in a virtualised environment so you can reset it cleanly
- Convert all steps to a fully automatic powershell script (e.g. for
conda, need to download the installer viawget, execute the installer etc. - Optionaly, test the powershell steps in an interactive container
docker run -it --isolation=process mcr.microsoft.com/windows/servercore:ltsc2019 powershell- This runs a windows container and gives you a shell to verify that your install script works
- When you exit the shell the container is stopped
- Create a
Dockerfile- Use
mcr.microsoft.com/windows/servercore:ltsc2019as the base image viaFROM - Use the
RUNcommand for each line of your powershell script
- Use
I tried installing scrapy on an existing windows Dockerfile that used conda / python 3.6, it threw error SettingsFrame has no attribute 'ENABLE_CONNECT_PROTOCOL' at a similar stage.
However I tried again with miniconda and python 3.8, and was able to get scrapy running, here's the dockerfile:
QUESTION
The task itself is immediately launched, but it ends as quickly as possible, and I do not see the results of the task, it simply does not get into the pipeline. When I wrote the code and ran it with the scrapy crawl command, everything worked as it should. I got this problem when using Celery.
My Celery worker logs:
...ANSWER
Answered 2021-Apr-08 at 19:57Reason: Scrapy doesn't allow run other processes.
Solution: I used my own script - https://github.com/dtalkachou/scrapy-crawler-script
QUESTION
I am attempting to login to https://ptab.uspto.gov/#/login via scrapy.FormRequest. Below is my code. When run in terminal, scrapy does not output the item and says it crawled 0 pages. What is wrong with my code that is not allowing the login to be successful?
...ANSWER
Answered 2021-Mar-16 at 06:25The POST request when you click login is sent to https://ptab.uspto.gov/ptabe2e/rest/login
QUESTION
I'm deploying Django in Google App Engine.
I get 502 Bad Gateway and in the log I get the following error:
2021-03-08 12:08:18 default[20210308t130512] Traceback (most recent call last): File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker worker.init_process() File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/workers/gthread.py", line 92, in init_process super().init_process() File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/workers/base.py", line 119, in init_process self.load_wsgi() File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/workers/base.py", line 144, in load_wsgi self.wsgi = self.app.wsgi() File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/app/base.py", line 67, in wsgi self.callable = self.load() File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/app/wsgiapp.py", line 49, in load return self.load_wsgiapp() File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/app/wsgiapp.py", line 39, in load_wsgiapp return util.import_app(self.app_uri) File "/layers/google.python.pip/pip/lib/python3.9/site-packages/gunicorn/util.py", line 358, in import_app mod = importlib.import_module(module) File "/opt/python3.9/lib/python3.9/importlib/init.py", line 127, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "", line 1030, in _gcd_import File "", line 1007, in _find_and_load File "", line 986, in _find_and_load_unlocked File "", line 680, in _load_unlocked File "", line 790, in exec_module File "", line 228, in _call_with_frames_removed File "/srv/main.py", line 1, in from django_project.wsgi import application File "/srv/django_project/wsgi.py", line 16, in application = get_wsgi_application() File "/layers/google.python.pip/pip/lib/python3.9/site-packages/django/core/wsgi.py", line 12, in get_wsgi_application django.setup(set_prefix=False) File "/layers/google.python.pip/pip/lib/python3.9/site-packages/django/init.py", line 19, in setup configure_logging(settings.LOGGING_CONFIG, settings.LOGGING) File "/layers/google.python.pip/pip/lib/python3.9/site-packages/django/conf/init.py", line 82, in getattr self._setup(name) File "/layers/google.python.pip/pip/lib/python3.9/site-packages/django/conf/init.py", line 69, in _setup self._wrapped = Settings(settings_module) File "/layers/google.python.pip/pip/lib/python3.9/site-packages/django/conf/init.py", line 170, in init mod = importlib.import_module(self.SETTINGS_MODULE) File "/opt/python3.9/lib/python3.9/importlib/init.py", line 127, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "/srv/django_project/settings.py", line 84, in import pymysql # noqa: 402 ModuleNotFoundError: No module named 'pymysql'
The problem is that I already installed pymysql, in fact if I run pip3 install pymysql, I get Requirement already satisfied: ...
Why is that? Thanks in advance!
Edit:
Here's requirements.txt:
ANSWER
Answered 2021-Mar-08 at 22:30If you run pip3 install pymysql in your local computer, this does not mean that when you deploy the app this module is packaged. In fact GAE attempts to install everything at build time using your requirements.txt file so it doesn't matter if you installed everything in your PC since GAE will not use what you have in local (talking about packages installed with pip).
Checking your requirements.txt file I do not see that the package PyMySQL is added. You should add it to that file and attempt to deploy again.
QUESTION
I am trying to scrape fight data from Tapology.com, but the content I am pulling through Scrapy is giving me content for a completely different web page. For example, I want to pull the fighter names from the following link:
So I open scrapy shell with:
...ANSWER
Answered 2021-Mar-04 at 02:12I tested it with requests + BeautifulSoup4 and got the same results.
However, when I set the User-Agent header to something else (value taken from my web browser in the example below), I got valid results. Here's the code:
QUESTION
I've been following along this guide to web scraping LinkedIn and google searches. There have been some changes in the HTML of google's search results since the guide was created so I've had to tinker with the code a bit. I'm at the point where I need to grab the links from the search results but have run into an issue where the program doesn't return anything even after implementing a code fix from this post due to an error. I'm not sure what I'm doing wrong here.
...ANSWER
Answered 2021-Mar-03 at 22:47I think I found the error in your code. Instead of using
QUESTION
I am trying to use Scrapy's CrawlSpider to crawl products from an e-commerce website: The spider must browse the website doing one of two things:
- If the link is category, sub-category or next page: the spider must just follow the link.
- If the link is product page: the spider must call a especial parsing mehtod to extract product data.
This is my spider's code:
...ANSWER
Answered 2021-Feb-27 at 10:40Hi Your xpath is //*[@id='wrapper']/div[2]/div[1]/div/div/ul/li/ul/li/ul/li/ul/li/a
you have to write //*[@id='wrapper']/div[2]/div[1]/div/div/ul/li/ul/li/ul/li/ul/li/a/@href
because scrapy doesn't know the where is URL.
QUESTION
I am currently working on a college project for Linkedin Web Scraping using selenium. Following is the code for the same:
...ANSWER
Answered 2021-Feb-26 at 11:38I think the problem ís because of your css selector. I try it my self and it is unable to locate any element on html main body
Fix your css selector and you will be fine
QUESTION
I'm trying to parse a numeric field using parsel. By default, the documentation shows how to extract text. And this:
...ANSWER
Answered 2021-Feb-24 at 17:21You can use lxml, because parcel conversion return str result.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install parsel
You can use parsel like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the parsel component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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