jsonlines | python library to simplify
kandi X-RAY | jsonlines Summary
kandi X-RAY | jsonlines Summary
python library to simplify working with jsonlines and ndjson data
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- Open a file .
- Return representation of a file descriptor .
- Default dump function .
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Community Discussions
Trending Discussions on jsonlines
QUESTION
I am scraping reviews from a website and these reviews tend to duplicate. The issue I am facing is with the mitatigation of duplicates and I am thinking my xpath may be an issue but I cannot solve this.
Here's what I have tried:
...ANSWER
Answered 2022-Feb-14 at 17:21You need to use relative xpath.
QUESTION
I wanted to know if it is possible to scrape information from previous pages using LinkExtractors
. This question is in relation to my previous question here
I have uploaded the answer to that question with a change to the xpath for country. The xpath provided, grabs the countries from the first page.
...ANSWER
Answered 2022-Feb-10 at 08:19CrawlSpider
is meant for cases where you want to automatically follow links that match a particular pattern. If you want to obtain information from previous pages, you have to parse
each page individually and pass information around via the meta
request argument or the cb_kwargs
argument. You can add any information to the meta
value in any of the parse methods.
I have refactored the code above to use the normal scrapy Spider
class and have passed the country value from the first page in the meta keyword and then captured it in subsequent parse methods.
QUESTION
I am trying to get within several urls of a webpage and follow the response to the next parser to grab another set of urls on a page. However, from this page I need to grab the next page urls but I wanted to try this by manipulating the page string by parsing it and then passing this as the next page. However, the scraper crawls but it returns nothing not even the output on the final parser when I load item.
Note: I know that I can grab the next page rather simply with an if-statement on the href. However, I wanted to try something different in case I had to face a situation where I would have to do this.
Here's my scraper:
...ANSWER
Answered 2022-Feb-08 at 13:49Your use case is suited for using scrapy
crawl
spider. You can write rules on how to extract links to the properties and how to extract links to the next pages. I have changed your code to use a crawl spider class and I have changed your FEEDS
settings to use the recommended settings. FEED_URI
and FEED_FORMAT
are deprecated in newer versions of scrapy
.
Read more about the crawl spider from the docs
QUESTION
I have created a script that scrapes some elements from the webpage and then goes into the links attached to each listing. Then it grabs additional further info from that webpage, however it scrapes relatively slow. I get ~ 300/min, and my guess is the structure of my scraper and how it's gathering the requests, following the url, and scraping the info. Might this be the case, and how can I improve the speed?
...ANSWER
Answered 2022-Feb-01 at 03:22From the code snippet you have provided, your scraper is set up efficiently as it is yield
ing many requests at a go which lets scrapy handle the concurrency.
There are a couple of settings you can tweak to increase the speed of scraping. However, note that the first rule of scraping is that you should not harm the website you are scraping. See below sample of the settings you can tweak.
- Increase the value of
CONCURRENT_REQUESTS
. Defaults to 16 in scrapy - Increase the value of
CONCURRENT_REQUESTS_PER_DOMAIN
. Defaults to 8 in scrapy - Increase Twisted IO thread pool maximum size so that DNS resolution is faster
REACTOR_THREADPOOL_MAXSIZE
- Reduce log level
LOG_LEVEL = 'INFO'
- Disable cookies if you do not require them
COOKIES_ENABLED = False
- Reduce download timeout
DOWNLOAD_TIMEOUT = 15
- Reduce the value of
DOWNLOAD_DELAY
if your internet speed is fast and you are sure the website you are targeting is fast enough. This is not recommended
Read more about these settings from the docs
If the above settings do not solve your problem, then you may need to look into distributed crawling
QUESTION
I'm trying to grab some data from the left-side column of a webpage. The aim is to click on all the show more
buttons using scrapy_playwright
, and grab the title of each the elements belonging to the show more
list. However, when I run my scraper it iterates the same header make
for all of the lists. I need to get these unique for each set of lists.
Here's my scraper:
...ANSWER
Answered 2022-Jan-28 at 04:51Your code has 2 issues. One your xpath selectors are not correct and two you are not using scrapy playwright therefore the clicks are not being done. Looping and changing the item index is not correct because once you click an item, that item is removed from the DOM and therefore the next item is now at the first index. Also, to enable scrapy-playwright
you need to have at least these additional settings:
QUESTION
I have created a scraper that grabs specific elements from a web-page. The website provides the option to go into all the artists
in the webpage, so I can directly get all the artists
from this page as there is no 'next-page' href provided by the website. My issue is that when I load all the websites into requests it crawls nothing, however when I reduce the list of webpages it will begin to crawl pages. Any ideas as to what is causing this issue?
Furthermore, I want to grab all the lyrics form the song-page. However, some lyrics are spaced out between a
tags, whilst others are a single string. However, at times I get no lyrics even though when I click the direct url the webpage has lyrics. How can I grab all the text regardless and get the lyrics to all songs? If I include the following:
ANSWER
Answered 2022-Jan-25 at 03:28Your code has quite a lot of redundant snippets. I have removed the redundant code and also implemented your request to have all the lyrics captured. Also all the information is available on the lyrics page so there's no need to pass the loader item around. You can simply crawl all the information from the lyrics page.
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 cannot get any information on the next page and do not understand where I went wrong. I get the following error for the next page follow:
DEBUG: Crawled (204) https://www.cv-library.co.uk/data-jobs?page=2&us=1.html> (referer: https://www.cv-library.co.uk/data-jobs?us=1.html)
Which suggests it has the correct next page, but I get a response 204 for some reason.
Here's my script:
...ANSWER
Answered 2022-Jan-06 at 15:01You also need the headers in response.follow
QUESTION
I have a file of jsonlines that contains items with node as the key and as a value a list of the other nodes it is connected to. To add the edges to a networkx graph, -I think- requires tuples of the form(u,v). I wrote a naive solution for this but I feel it might be a bit slow for big enough jsonl files does anyone got a better, more pythonic solution to suggest?
...ANSWER
Answered 2021-Dec-24 at 16:17If the dict never have more than one item, you can do this:
QUESTION
I am using the python client for GPT 3 search model on my own Jsonlines files. When I run the code on Google Colab Notebook for test purposes, it works fine and returns the search responses. But when I run the code on my local machine (Mac M1) as a web application (running on localhost) using flask for web service functionalities, it gives the following error:
...ANSWER
Answered 2021-Dec-20 at 13:05The problem was on this line:
file = openai.File.create(file=open(jsonFileName), purpose="search")
It returns the call with a file ID and status uploaded which makes it seem like the upload and file processing is complete. I then passed that fileID to the search API, but in reality it had not completed processing and so the search API threw the error openai.error.InvalidRequestError: File is still processing. Check back later.
The returned file object looks like this (misleading):
It worked in google colab because the openai.File.create call and the search call were in 2 different cells, which gave it the time to finish processing as I executed the cells one by one. If I write all of the same code in one cell, it gave me the same error there.
So, I had to introduce a wait time for 4-7 seconds depending on the size of your data, time.sleep(5)
after openai.File.create call before calling the openai.Engine("davinci").search call and that solved the issue. :)
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Install jsonlines
You can use jsonlines 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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