crawdad | Cross-platform persistent and distributed web crawler crab | Crawler library
kandi X-RAY | crawdad Summary
kandi X-RAY | crawdad Summary
crawdad is cross-platform web-crawler that can also pinch data. crawdad is persistent, distributed, and fast. It uses a queue stored in a remote Redis database to persist after interruptions and also synchronize distributed instances. Data extraction can be specified by the simple and powerful pluck syntax. For a tutorial on how to use crawdad see my blog post.
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Top functions reviewed by kandi - BETA
- main creates a new app
- Crawl starts crawling .
- New returns a new Crawler instance .
- round rounds a float to an int
- SetLogLevel sets the log level .
crawdad Key Features
crawdad Examples and Code Snippets
--server value, -s value address for Redis server (default: "localhost")
--port value, -p value port for Redis server (default: "6379")
--url value, -u value set base URL to crawl
--exclude value, -e value set
[[pluck]]
name = "description"
activators = ["meta","name","description",'content="']
deactivator = '"'
limit = 1
[[pluck]]
name = "title"
activators = [""]
deactivator = ""
limit = 1
$ crawdad -set -url "https://rpiai.com" -pluck pluck.toml
$ cra
$ crawdad -set -url https://rpiai.com
$ crawdad -server X.X.X.X
$ crawdad -dump dump.txt
Community Discussions
Trending Discussions on crawdad
QUESTION
I'm trying to extract URLs from multiple webpages (in this case 2) but for some reason, my output is a duplicate list of URLs extracted from the first page. What am I doing wrong?
My code:
...ANSWER
Answered 2020-May-28 at 11:42You are getting duplicate URLs because both times you are loading the same page. That website shows only the first page of best-sellers if you are not logged in, even if you set page=2
.
To fix this, you will have to either modify your code to login first before loading the pages, or to pass cookies that you have to import from a logged-in browser.
QUESTION
I have a 3d scatter chart as shown in the image. I have to divide the axis and create set of 3d boxes in chart and count total number of point in each 3d box. Can anybody tell me how to create 3d boxes in the chart and count number of points in every box.
Here i have used crowd_temperature dataset to generate scatter plot.
...ANSWER
Answered 2020-Apr-07 at 20:13You can do a 3D histogram using np.histogramdd()
where you set up your bins along your x, y, and z axis. You can find the documentation on how to use the function here. If you would like more help in solving your problem please provide sample code.
On another note, there are probably better ways to visualize your data. I think you will find it rather difficult to visualize this 3D histogram in a meaningful way. Try taking a latitude vs. temperature approach or just do a latitude vs. longitude histogram to see the spatial distribution of data.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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