scraped | Write declarative scrapers in Ruby | Scraper library
kandi X-RAY | scraped Summary
kandi X-RAY | scraped Summary
Write declarative scrapers in Ruby. If you need to write a webscraper (maybe to scrape a single page, or one that hits a page which lists a load of other pages, and jumps into each of those pages to pull out the same data) the scraped gem will help you write it quickly and clearly.
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Top functions reviewed by kandi - BETA
- Creates a new response .
- Returns the first successful response
- Returns the response .
- Returns an HTTP response .
- Generate a fragment from a JSON fragment
- Parse the response
- Gets the url value
- Retrieves the Nokogiri
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Trending Discussions on scraped
QUESTION
I've an application, and I'm running one instance of this application per AWS region.
I'm trying to instrument the application code with Prometheus metrics client, and will be exposing the collected metrics to the /metrics
endpoint. There is a central server which will scrape the /metrics
endpoints across all the regions and will store them in a central Time Series Database.
Let's say I've defined a metric named: http_responses_total
then I would like to know its value aggregated over all the regions along with individual regional values.
How do I store this region
information which could be any one of the 13 regions and env
information which could be dev
or test
or prod
along with metrics so that I can slice and dice metrics based on region
and env
?
I found a few ways to do it, but not sure how it's done in general, as it seems a pretty common scenario:
- Storing
region
andenv
info as labels with each of the metrics (not recommended: https://prometheus.io/docs/instrumenting/writing_exporters/#target-labels-not-static-scraped-labels) - Using target labels - I have
region
andenv
value with me in the application and would like to set this information from the application itself instead of setting them in scrape config - Keeping a separate gauge metric to record
region
andenv
info as labels (like described here: https://www.robustperception.io/exposing-the-software-version-to-prometheus) - this is how I'm planning to store my applicationversion
info in tsdb but the difference between appversion
info andregion
info is: the version keeps changing across releases however region is which I get from the config file is constant. So, not sure if this is a good way to do it.
I'm new to Prometheus. Could someone please suggest how I should store this region
and env
information? Are there any other better ways?
ANSWER
Answered 2022-Mar-09 at 17:53All the proposed options will work, and all of them have downsides.
The first option (having env
and region
exposed by the application with every metric) is easy to implement but hard to maintain. Eventually somebody will forget to about these, opening a possibility for an unobserved failure to occur. Aside from that, you may not be able to add these labels to other exporters, written by someone else. Lastly, if you have to deal with millions of time series, more plain text data means more traffic.
The third option (storing these labels in a separate metric) will make it quite difficult to write and understand queries. Take this one for example:
QUESTION
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 div
section I'm using to scrape the data:
ANSWER
Answered 2022-Mar-01 at 19:43The 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
QUESTION
I'm having trouble extracting some data properly and into a SQL db, which i'm hoping someone can help with. The data is scraped from a website and represents Dutch postal codes and cities
The official Dutch postal codes are composed of 4 digits, a space in between, and a 2 capital letter addition. For example
...ANSWER
Answered 2022-Feb-16 at 12:53Maybe this can help you, I have tested it a little bit with the list data. I split x on spaces and then check if the second part has 2 capital letters. with the regex pattern [A-Z]{2}. [A-Z] Means any capital letter, and {2} means that exactly 2 of those character must be found.
But in AAA also 2 of capital letters can be found.
The regex function search returns a Match object when a match has been found and otherwise None. If you turn it into a boolean with bool(), that's either True or False. This way you can add the check on the length with the len-function to it.
QUESTION
I have an assignment that has a data mining element. I need to find which authors collaborate the most across several publication webpages.
I've scraped the webpages and compiled the author text into a list.
My current output looks like this:
...ANSWER
Answered 2022-Feb-14 at 21:36You could use a dictionary where the pair is the key and the number how often it occurs is the value. You'll need to make sure that you always generate the same key for (Author1,Author2)
and (Author2, Author1)
but you could choose alphabetic ordering for dealing with that.
Then you simply increment the number stored for the pair whenever you encounter it.
QUESTION
I am interested in returning all records with a given partition key value (i.e., u_type = "prospect"). But I only want to return specific attributes from each of those records. I have scraped together the following snippet from boto docs & Stack answers:
...ANSWER
Answered 2022-Jan-31 at 19:22AttributesToGet
is a legacy parameter, and the documentation suggests using the newer ProjectionExpression
instead. The documentation also says that ProjectionExpression
is a string, not a list. It may be a list in the NodeJS SDK, in the answer you linked to, but in Python the documentation says it must be a string. So I would try this:
QUESTION
I'm trying to figure out if there's a procedural way to merge data from object A to object B without manually setting it up.
For example, I have the following pydantic model which represents results of an API call to The Movie Database:
...ANSWER
Answered 2022-Jan-17 at 08:23use the attrs
package.
QUESTION
I want price history scraped from this site: upon click of price history button the table gets loaded but the url remains same. I want to scrape the table loaded.
...ANSWER
Answered 2021-Dec-11 at 18:34Using DevTools
(tab: Network
) in Chrome/Firefox you can see this page uses JavaScript
to load data from another URL.
QUESTION
- Python Version: 3.8
- bs4 library
I have the following HTML which represents 2 of about 20+ reviews I have scraped. I didn't include the rest here because of space, but you can imagine that these blocks keep repeating.
I need to retrieve "sml-rank-stars sml-str40 star" (as seen in the second line here) from each review.
...ANSWER
Answered 2022-Jan-06 at 10:25To iterate over all .review-rank
select all of them - To get the the rank only use a list comprehension:
QUESTION
Trying to extract data between semicolons and put that data into new columns.
Here is some data
...ANSWER
Answered 2021-Dec-30 at 16:41QUESTION
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 07:59Here 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:
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